Suggestion	Votes
1. Support for CSS3 overflow-x and overflow-y properties	23
2. quic support or compatibility?	21
3. http://dev.w3.org/html5/spec-LC/history.html#unloading-documents	21
4. I suggest support for TransferableObject types (of which there are several)	18
5. I would like to see document.readyState supported values in the caniuse.com	18
6. I suggest adding statistics for Aural style sheets which contain CSS properties such as "speak....	18
7. The bdi (bidi isolate) element, added in HTML5 to ease inserting RTL text into an LTR page or vice-v...	17
8. CSS3 marquee support.	17
9. The <keygen> tag is a bit of a mess when it comes to support, so it would be quite a useful ad...	17
10. css3 animation-play-state please	17
11. Add column-span and column-fill features	16
12. How about overflow-scrolling? iOS Safari needs the webkit vendor prefix for example. Can't find ...	16
13. I have just noticed that the onended event of the HTML5 <audio> tag is supported in Firefox 11...	16
14. mediagroup content attribute, MediaController object, VideoTrackList, AudioTrackList objects	16
15. input[autocomplete] (values besides on/off)	15
16. XSLT Support table	15
17. text-wrap	15
18. The Output Element	15
19. Soft hyphen: html entity &shy;	15
20. Browser support for crossorigin attribute on img/video (as described in ) would be useful	15
21. Add theme-color Meta Tag	14
22. Include `baseline-shift` CSS property	14
23. css/svg property dominant-baseline	14
24. SVGZ-specific support table since iOS < 4.2 doesn't support it, but does support SVG. Not su...	14
25. CSS3 Template Layout	14
26. requestAutoComplete	13
27. Show browser support for CSS border-collapse and border-spacing (and there might be other table-rela...	13
28. CSS3 min() and max() functions as values for properties that accept <dimension> as a value.	13
29. Please add support tables for x-xss-protection security header. Thanks!	12
30. https://developer.mozilla.org/en-US/docs/Web/Events/wheel	12
31. I couldn't find a compatibility table for animation-fill-mode. Currently needs browser prefixe...	12
32. device-cmyk css feature	12
33. What about showing support for various link attributes, like "subresource" or "dns-pr...	11
34. Built-in PDF viewer support	11
35. For printing support for the size:landscape option to tell the browser what page orientation we want...	11
36. geo: url support -	11
37. list-style-type	11
38. I suggest adding information about support for alternate HTTP methods such as PUT and PATCH.	11
39. Emoji display support	11
40. Quota Management API	10
41. The mouseenter and mouseleave events	10
42. line-height support and the differences in rendering between webkit&trident and other engines.	10
43. Add Array.prototype.includes	10
44. document.elementsFromPoint	10
45. Check browser support for displaying MJPEG files. This is a motion JPEG file format that is supporte...	10
46. Why do white-space not appear to be in the list? :)	10
47. window.onerror - / - particularly mobile browser support	10
48. Keyboard events (keypress, keyup, keydown, textinput) - see here	9
49. WebExtensions (browser extensions)	9
50. accesskey attribute on non-focusable elements (should cause a click element to fire	9
51. webcl?	9
52. Support for window.scrollX and window.scrollY	9
53. Webkit-based browsers extend the MediaQuery W3C Standard with specific queries for animation, transi...	9
54. saveAs does not seem to be on the site (or else, I'm just incapable of finding it). It would be ...	9
55. Show support table with history as time-based, instead of versions-back-based. With Chrome and IE ve...	9
56. the withCredentials property in xhr = new XMLHttpRequest() is used to check for XMLHttpRequest suppo...	9
57. script tag onerror attribute	8
58. CSS3 module "Generated Content for Paged Media" and especially the target-counter function	8
59. Support for SVG's "shape-rendering" CSS property.	8
60. Entries for href values including `tel:1234567` and `sms:1234567`	8
61. I'd like to see border-corner-shape added. It would be a nice feature when implemented in browse...	8
62. CSS3 Speech Module Which browsers support it? See	8
63. webM alpha transparency	8
64. Show results for Firefox ESR (currently 17.07).	8
65. Progressive JPEGs start to show on pages faster, from low quality and eventually getting their 100% ...	8
66. CSS image() functional notation (e.g. for background-images etc). See	7
67. I would like to know which browsers support the forceSpellCheck() method (	7
68. Add support for CSS's @import	7
69. Embedded color profiles in JPEG images.	7
70. column-span and other column-* proprieties of CSS3 Multi-column layout module	7
71. Geofencing API	7
72. Add nextElementSibling	7
73. Add navigator.mediaDevices	7
74. break-inside for columns.	7
75. Add browser support for text-decoration-skip [ - Not sure if any browsers support it yet, but someth...	7
76. list-style-image	7
77. Support for list-style-type	7
78. blink tag	7
79. Track document.registerElement I think a test just to see if it is defined would be sufficient. It...	7
80. clipboardData: text, rtf, html, image, etc.	7
81. DataChannel WebRTC JS API	7
82. Based on this page I suggest to add addRule and insertRule Thanks	7
83. Add System Info API	7
84. "GeometryUtils" - part of the CSSOM. Provides much better position information than existi...	6
85. The 'media' attribute from the source element for HTML5's audio and video elements. Thi...	6
86. http://www.w3.org/TR/html-json-forms/	6
87. The "auto" value for the dir attribute, added in HTML5 to ease inserting text of unknown d...	6
88. CSS <angle> - particularly the "turn" unit	6
89. Add browser support for toggle()	6
90. ECMAScript 6 collection: Set	6
91. font-variant-numeric	6
92. More details on File Blobs	6
93. Browser support for RTP streams?	6
94. Javascript: Array.prototype.fill()	6
95. HttpOnly flag for cookies, what browsers support? it would be nice to have that in the caniuse.com	6
96. Object.assign	6
97. Can I use ECDSA certificates?	6
98. domElement.style.setProperty()	6
99. Dialogs implemented using separate documents window.showModalDialog()	6
100. DNS-based Authentication of Named Entities (DANE)	6
101. X-Content-Type-Options: nosniff	6
102. SVG Foreign Object is a way to combine different XML namespaces elements into the SVG.	6
103. Which browsers support colgroup completely?	6
104. draggable option	6
105. Bitmap images inside SVG files. Some browsers that support SVG, will not show embedded bitmap image...	6
106. html5 canvas.toblob	6
107. Web NFC API	6
108. TCP Fast-Open. Now that Linux kernels enable this by default (and web servers likely won't be ...	6
109. playbackRate in video	5
110. Scheme-less URIs, aka the relative URIs. See	5
111. Why don't we add quotes property?	5
112. Can I use "onmouseover", "onmouseout"?	5
113. empty-cells (	5
114. MediaStream Recording (	5
115. registerContentHandler(), registerProtocolHandler(), and friends	5
116. Please add "imageSmoothingEnabled". Chrome supports it unprefixed. IE11, Firefox, and Saf...	5
117. Textarea wrap attribute (off, soft, hard, virtual, physical)	5
118. vector-effect	5
119. WeakMap API	5
120. getElementsByName	5
121. image-rect isn't supported by anybody but Mozilla as far as I can tell, but I'd love it to b...	5
122. designMode	5
123. "click" function on anchor DOM element (a)	5
124. Add stale-while-revalidate HTTP header support indication	5
125. Load event support on link nodes to show when a stylesheet is finished loading. See for a discussio...	5
126. "border-corner-shape"	5
127. Add more CSS3 media query sub-types: e.g. 'orientation' and 'aspect-ratio'	5
128. <meta name="apple-mobile-web-app-capable" content="yes" />	5
129. HTML5 Events Like onoffline, onpopstate, etc.	5
130. location.origin	5
131. add "HTTP status code headers"	5
132. Add beforeinput event	4
133. .style.setAttribute() Does every browser support it? Sometimes it's hard to know it it's not...	4
134. feature: track ReadableStream	4
135. Flag storage that is not available under private mode	4
136. CSS Box Alignment Module Level 3	4
137. Add `navigator.doNotTrack` and DNT support tables	4
138. Add WebDriver	4
139. MouseEvent	4
140. Add: the 'isolation' CSS property	4
141. Add supported elliptical curves (HTTPS/TLS)	4
142. Add support table for CSP 3.0 compliance	4
143. Add createImageBitmap	4
144. Add browser support info for the HTTP Cache-Control header "immutable" flag	4
145. Luminosity media query	4
146. form input property "valueAsNumber"	4
147. 'caniuse.com' should have small-caps (and other font variants?) broken out as a separate fea...	4
148. Please add :autofill to the DB	4
149. svg @preserveaspectratio	4
150. Add auxclick?	4
151. http://www.w3.org/TR/web-alarms/	4
152. New feature request: OCSP must-staple	4
153. EventArgs.buttons is new for mouse events (www.w3.org/TR/DOM-Level-3-Events/#events-MouseEvent-butto...	4
154. track element and TextTrack object	4
155. CSS minmax()	4
156. target-new	4
157. user-input	4
158. window.Touch support for browsers: - returns the Touch object constructor on touch events supporting...	4
159. font-weight: (CSS3) Which browsers support numeric weights (200, 300) as opposed to simply "bol...	4
160. lastModified HTML5 DOM property	4
161. Touch Icons, per	4
162. track arraybuffer support for binary websockets	4
163. @host This CSS @-rule applies to the surrounding element of a template. See	4
164. rel="next"	4
165. CSS Shaders -	4
166. extend-to-zoom	4
167. Web intents/Web Activities	4
168. svg transform matrix	4
169. Add ProgressEvent	4
170. Messaging API (SMS)	4
171. Support for XPath 2.0 (interesting for a lot of new functions, like base-uri(), matches() etc.)	4
172. Add prefers-reduced-motion	4
173. image-resolution. I've seen this as a good alternative for retina images as opposed to backgro...	4
174. Add table-layout support, whether browers: - implement the 'fixed' layout properly, evenly ...	4
175. I suggest you to put browser acceptance of the javascript property clientHeight	3
176. Would like to see support for XMLSerializer object and document.implementation.createDocument and eq...	3
177. JavaScript Promises.prototype.finally()	3
178. Multicolor Glyph support	3
179. Missing font-synthesis CSS 3 property	3
180. Add current browser support for HTML5 tag "hgroup" (	3
181. Please add a support table for the CanvasRenderingContext2D.filter property that firefox supports.	3
182. Wake Lock API	3
183. Web Authentication (webauthn)	3
184. CSS Property caption-side is missing?	3
185. The hanging-punctuation property: Currently unsupported by any browser, but it would be nice to ...	3
186. Support for line-break	3
187. CSS "visibility" (hidden/visible/etc)	3
188. SVG-in-OT fonts	3
189. file input type supported browser	3
190. `content: leader('.');`	3
191. @document, as described in &	3
192. Support SVG width/height = auto	3
193. Add SVG `use` with external reference	3
194. Input type=email with "multiple" attribute	3
195. css3 border-color	3
196. column-break-after atm only via: -webkit-column-break-after	3
197. UI Events builds on DOM Event Level 3, it is specified here	3
198. Trailing commas	3
199. Secure Cookie flag	3
200. text-security missing in list of features	3
201. Add support for the svg paint-order property	3
202. Number.prototype.toLocaleString() has no data	3
203. Add Expect-CT header	3
204. Add text-underline-position property	3
205. Add 'require-sri-for' CSP Directive	3
206. Add event currentTarget property	3
207. ex unit	3
208. SharedArrayBuffer support	3
209. Track WritableStream, ReadableStream.prototype.pipeTo, TransformStream, ReadableStreamByobReader	3
210. Add support for FlyWeb API	3
211. target-new	3
212. valueAsDate usage	2
213. autocorrect for input fileds	2
214. Add referrerpolicy attribute	2
215. audio / video autoplay attribute and play function	2
216. Add save-data client hint	2
217. history.scrollRestoration	2
218. console.assert(boolean_expression)	2
219. JavaScript: Tail Call Support information missing	2
220. Firefox cursor:grab & cursor:grabbing	2
221. longdesc attribute support	2
222. Please add navigator.cookieEnabled	2
223. Support for Multiline Strings	2
224. Add KeyboardEvent.repeat compatibility info	2
225. Hyphenation Options	2
226. HTTP Strict Transport Security Preload	2
227. font-min/max-size	2
228. Arithmetic coded JPEG support	2
229. Add suport for MediaDevices.enumerateDevices()	2
230. Add HTTP 103 Early Hints	2
231. img.decode() and decoding attribute	2
232. SVG viewport-fill-opacity property support	2
233. Include the new image format: FLIF	2
234. browserconfig.xml support info	2
235. Can I use X3D?	2
236. CSS env() support	2
237. Animating SVG paths using CSS	2
238. Add in Range.createContextualFragment	2
239. Add <time> element	2
240. Cache-Control	2
241. Add other values of `user-select` property	2
242. Feature request: Token Binding Protocol	2
243. XMLHTTPRequest (1)	2
244. Add Media Queries Ranges	2
245. Add ES7/2016 SIMD	2
246. Add data for AV1 supported browser?	2
247. Network Service Discovery	2
248. HTTP immutable responses	2
249. Add :host/:host-context pseudo class	2
250. Entries API	2
251. SHA2 certificates	2
252. CSS 3 property: text-autospace and text-spacing	2
253. Support for nested calc expressions in CSS values	2
254. Add DNSSEC support	2
255. Support for 'debugger;' in dev tools	2
256. Add transform-box	2
257. InputDeviceCapabilities API	2
258. The !important css thing. It's very !important ;).	2
259. Date.prototype.toLocaleDateString	2
260. UTF-8 Dingbats	2
261. Why is there no event constructors?	2
262. Add `q` (quarter-millimeters) length unit	2
263. Add background-clip: text	2
264. Add color-mod() | color() function - CSS Color Module Level 4	2
265. CSS.escape()	2
266. Add :any-link pseudo-class	2
267. Add Clear Site Data header	2
268. New feature request: x25519 Key Exchange	2
269. Browser support for Focus Management function	2
270. Directional focus navigation: the nav-up, nav-right, nav-down, nav-left properties	2
271. Add box-suppress	2
272. Content-Security-Policy: script-nonce	2
273. Input type=range with "multiple" attribute	2
274. Object.entries feature?	2
275. Individual transform properties	2
276. Add the "frame" HTML tag : some browsers don't support it !	2
277. Add justify-content: space-evenly	2
278. strong	2
279. Please add line-height-step	2
280. Add classList.replace()	2
281. create @Media Types	1
282. Add CSS text-combine-upright property	1
283. Previous Element Selector	1
284. HTML oninvalid Event Attribute	1
285. Can I use selectedOptions ?	1
286. x-webkit-speech	1
287. Range.surroundContents()	1
288. WebGL extensions	1
289. Screen.availLeft	1
290. NodeList/HTMLCollection	1
291. ie behavior	1
292. support for Performance-Timeline & High-Resolution-Time	1
293. Function.length / Function.prototype.length	1
294. show support for namespacing; for example <svg: namespace	1
295. The xml:space attribute	1
296. RFC7692 Compression Extensions for WebSocket	1
297. Add window.frameElement to CanIUse	1
298. window.localMediaStream is not listed	1
299. Add data for link rel="alternate"	1
300. Suggestion for caniuse.com: Which browsers.versions support multiple tbody elements in a single table?	1
301. image tag	1
302. Add support stats for String.prototype.repeat()	1
303. SVG viewport-fill property support	1
304. Add data for imageSmoothingEnabled Property (Canvas-related)	1
305. allowtransparency	1
306. Add web assembly/wasm	1
307. Split background-size from CSS3 Background-image options	1
308. Add css pseudo-classes :read-only and :read-write browsers support	1
309. Support of sms: and mms: in mobile browsers is not clear	1
310. SVG 1.2	1
311. CSS Inline Layout	1
312. html5 image attribute usemap	1
313. filename*=UTF-8''...	1
314. window.location.replace	1
315. embed tag	1
316. Indicate which browsers use the HTML5 Parsing algorithm.	1
317. getClientRects	1
318. support for "offsetParent"?	1
319. Geometry Interfaces Module Level 1	1
320. add support for Array.prototype.find.	1
321. What is the support on clear: both?	1
322. Add support information for the translate attribute	1
323. Request: nav-up, nav-down, nav-left, nav-right css3 properties	1
324. Add support for control.labels	1
325. background-composite	1
326. add onstorage	1
327. Add `onunload` event	1
328. Add: window.locationbar window.menubar window.personalbar window.statusbar window.toolbar	1
329. Add WebKit Tap Highlight Color (-webkit-tap-highlight-color)?	1
330. Add removeAttribute support	1
331. Add windows-theme media query selector	1
332. getShaderPrecisionFormat	1
333. HTMLImageElement.complete	1
334. The `autocapitalize` attribute of <input>s	1
335. window.addListener()	1
336. Add HTMLInputElement.select()	1
337. HTML5 data blocks	1
338. wakeLock	1
339. IETF RFCs	1
340. Please add XMLHttpRequest.responseURL	1
341. orientationchange Event	1
342. Can not search hasAttribute	1
343. [Suggestion] display: fullscreen	1
344. display: table-caption?	1
345. Window setInterval() Method	1
346. HEVC in Safari	1
347. min/max-device-width/height	1
348. Lookbehind in JavaScript regex	1
349. Add High Resolution Time Level 3	1
350. support data suggestion: DOM event constructors ?	1
351. JavaScript Symbol	1
352. function.name	1
353. new.target	1
354. add micropub	1
355. String.prototype.split() with a regex with grouping ( parentheses ).	1
356. caretPositionFromPoint	1
357. AnimationEvent support	1
358. Add: Task Scheduler API Specification	1
359. Default function parameters	1
360. add css property aspect-ratio	1
361. Add CSS animation timing function spring()	1
362. Add Web Budget API	1
363. Support JavaScript Class and Property Decorators (ES Stage 2 Draft)	1
364. Native Messaging?	1
365. Consider add 'getRootNode'?	1
366. Support for CSS3 background-repeat-x and background-repeat-y properties	1
367. CanvasRenderingContext2D.ellipse()	1
368. aria-current	1
369. Add css-timing	1
370. add aria-required to caniuse, if not already there	1
371. Feature Policy	1
372. Grid-auto-flow	1
373. add syncmanager	1
374. srcset/sizes attribute / picture element support in SVG	1
375. event.ctrlKey	1
376. Support the W3 Web Annotation standard (W3C Recommendation)	1
377. CanIuse @charset "<charset>"	1
378. CSS: overflow-anchor	1
379. Missing `StorageQuota` support	1
380. add "document.contentType"	1
381. webshareapi	1
382. window.navigator.language, .languages	1
383. Add support for CSS3 move-to property	1
384. Add support for addHitRegion	1
385. Alt-Svc header browser support info: consider adding	1
386. dblclick Event	1
387. Presentation API	1
388. Add XSL to caniuse	1
389. SVG sprites with <symbol> and <use>	1
390. document.referrer	1
391. CSS unit 'cap' (cap-height)	1
392. Add overscroll-action	1
393. Add support for the HTTP header X-Download-Options	1
394. Add transitionstart event	1
395. Feature request: navigator.language	1
396. -webkit-box-orient is not found	1
397. Add CSS font-synthesis	1
398. Add support for HTTP header X-Permitted-Cross-Domain-Policies	1
399. SHA1 certificates	1
400. getTotalLength()	1
401. Add CSS matrix3d support	1
402. New top level domains (TLD)	1
403. aria-labelledby	1
404. Add CSS display:contents	1
405. CSS touch-action level 2 values	1
406. Add raw sockets API	1
407. Add app-region?	1
408. Video media in image contexts	1
409. Add "Controlling Font Display Per Font-Family via @font-feature-values"	1
410. Add Dynamic Module Imports	1
411. css- media-query max-scroll-y	1
412. Add Media Session API Coverage Information	1
413. :truncated	1
414. treeWalker / nodeIterator support needs to be added	1
415. Include naviagator.mediaSession and other media related api	1
416. Add AbortController	1
417. browser coverage for service worker background-sync	1
418. focusNode	1
419. Support for CSS grid's subgrid	1
420. Need full 3gp browser compatibility chart.Does it chrome browser supports 3gp format	1
421. Add Module Preload <link rel="modulepreload">	1
422. Paint Timing API	1
423. Add support tables for document.documentElement.clientWidth	1
424. Please add support for supported x509 extensions for ʜᴛᴛᴘꜱ certificates	1
425. Asynchronous Clipboard API (replaces document.execCommand)	1
426. Suggestion: overflow(-[xy])? with 'overlay' value	1
427. Add pls pipeline-operator	1
428. Suggestion: MediaRecorder.isTypeSupported supported types/codecs	1
429. CSS page property (for printing)	1
430. Page-margin boxes (@top-center, etc)	1
431. Add support for document.queryCommandState	1
432. Input Events Level 1 and 2	1
433. ExtendableEvent.waitUntil()	1
434. Add support for text-decoration-skip-ink	1
435. WebCrypto Key Discovery	1
436. color-gamut media feature from Media Queries 4	1
437. Add information for the webcal and webcals protocols for subscribing to iCalendars	1
438. {row,column}-gap, applied to multicolumn, flex, and grid layouts	1
439. window.prompt, window.alert, window.confirm	1
440. Add Navigation Timing Level 2	1
441. Add previousSibling and previousElementSibling	1
442. Server Timing	1
443. navigator.isProtocolHandlerRegistered and .unregisterProtocolHandler	1
444. Async iterators / for await of	1
445. Add translate attribute	1
446. input setRangeText	1
447. Add support for CSS rule @document	1
448. font-language-override	1
449. Add <data> element	1
450. URLSearchParams.prototype.sort	1
451. Visual Viewport API	1
452. Device-Memory Client Hint & navigator.deviceMemory JS API	1
453. SVG symbols in CSS	1
454. setTimeout and setInterval callback parameters	1
455. Content-Security-Policy: block-all-mixed-content	1
456. Keyboard Lock	1
457. Support data suggestion: `Intl.PluralRules`	1
458. EventTarget constructor	1
459. Support XMLDocument	1
460. MediaStream Image Capture	1
461. getFilesAndDirectories	1
462. Add nomodule (<script> tag attribute)	1
463. Add new SVG filter effects	1
464. grid-template-columns	1
465. Observable	1
466. Text-overflow level 4	1
467. window.top & window.parent	1
468. Abortable fetch()	1
469. Support for ImageBitmapRendereingContext	1
470. (function () {}).toSource()	1
471. Add mediaSession API	1
472. String.prototype.padStart	1
473. ew-resize	1
474. Drag and Drop API - ghost image with customizable opacity	1
475. oncontextmenu	1
476. Geolocation on non-secure sites	1
477. Audio Output Devices API: wd	1
478. Please add Progressive web app manifest.	1
479. Drag and Drop API - move constraints	1
480. HTTP Trailers	1
481. window.event	1
482. -ms-overflow-style	1
483. Add a footnote regarding HTMLAudioElement	1
484. Object.hasOwnProperty	1
485. ActiveX	1
486. Support info for the <track> element	1
487. Add media feature display-mode	1
488. Node.isSameNode() and Node.isEqualNode() isn't listed on caniuse	1
489. Add HTTP 307 & 308 redirects	1
490. toLocaleString('pt-BR',{style: 'currency', currency:'BRL'})	1
491. Add CSS viewport-percentage length units 'vi' and 'vb'	1
492. Add Range.getBoundingClientRect browser support table	1
493. Add compositionstart/end/update event	1
494. Add support for mediacapture-output API's sinkID	1
495. Add print-color-adjust	1
496. audio / video .canPlayType(MIMEtype)	1
497. The <slot> element	1
498. Add ALPN and NPN notes to HTTP2	1
499. DeviceOrientation and DeviceMotion events on insecure origins	1
500. Javascript - window.onorientationchange	1
501. @document CSS	1
502. Add the (view-mode) media feature	1
503. MediaCapture Screen Share	1
504. Add <script type="module"> and module workers	1
505. Please add information about ImageData constructor	1
506. stopImmediatePropagation,stopPropagation	1
507. Support for the frame-ancestors directive	1
508. HTMLElement.offsetTop	1
509. image urls with GET data	1
510. Add ES6 Spread operator	1
511. Edge and IE don't support IndexedDB in web workers	1
512. NetworkInformation.downlinkMax	1
513. Add info about css user-modify and -webkit-user-modify:read-write-plaintext-only	1
514. createImageBitmap	1
515. Please add support for getTimezoneOffset()	1
516. allowfullscreen attribute for iframes	1
517. Link headers	1
518. Which browsers adhere to ETag?	1
519. Add `multipart/x-mixed-replace`	1
520. onerror event on iframe	1
521. IANA time zone names in timeZone option	1
522. &euro; and other html codes	1
523. HTTP2 Server Push	1
524. Add autocorrect, autocapitalize, autocomplete attributes	1
525. findIndex Array method doesn't added to caniuse.com DB	1
526. Can I use Reporting API	1
527. add CSS Extensions meant for renaming	1
528. navigator.connection	1
529. Adding Silverlight usage stats	1
530. Add CSS4 Grid structural selectors	1
531. Basic Authentication: AuthName directive	1
532. request support for 'accept-charset'	1
533. ImageBitmap	1
534. document type	1
535. event.path	1
536. Support for window.innerHeight, window.innerWidth, window.outerHeight, window.outerWidth	1
537. What about Standby API?	1
538. Please track the various HTTP Set-Cookie options supported by browsers	1
539. Add ECC certificates	1
540. Encoding API compatibility table	1
541. Add hreflang attribute usage support for link element	1
542. Add 'animated GIF as favicon'?	1
543. Cannot see |ImageCapture| entry in the web interface.	1
544. KeyboardEvent.isComposing	1
545. Information about window.location.ancestorOrigins	1
546. CSS tag {content: url()}	1
547. apple-touch-icon	1
548. Please add String.prototype.normalize()	1
549. Missing a check for msConvertURL() on DragEvent	1
550. reflected-xss missing	1
551. add WebMention	1
552. Add Cache Storage API / Cache API	1
553. CSS4 - Specifying profiled colors: the color() function	1
554. animateMotion for SVG	1
555. CSSKeyframesRule	1
556. gesturestart, gesturechange, gestureend events for trackpads	1
557. Inert property for objects that should currently not be focused	1
558. Add "Named function expressions"	1
559. SharedMemory/Atomics	1
560. Open search autodiscovery	1
561. Shape Detection API: Face Detection, Barcode Detection, Text Detection	1
562. add mouse event positions event.offsetX and event.offsetY	1
563. Cookies: max-age	1
564. [CSS Level 4 pseudo-class] :user-error	1
565. Suggestion: Int64 UInt64 (Firefox only AFAIK)	1
566. attachEvent event handler missing from CanIUse	1
567. string-set	1
568. Please add iFrame element contentWindow property	1
569. CaretPosition missing	1
570. window.scroll	1
571. Add visibility: collapse	1
572. Add PerformanceObserver	1
573. Support Tables for Gesture Events	1
574. Slash-separated color functions	1
575. Add HTTP_ORIGIN feature	1
576. Add float: footnote to CSS3	1
577. WindowTimers.setInterval()	1
578. video/audio events like loadedemetadata	1
579. Internationalized Domain Name	1
580. Vast & VMAP	1
581. Support setCapture and releaseCapture for mouse	1
582. Canvas context getTransform() function.	1
583. <video> `playsinline` attribute	1
584. Javascript Built-In MAP	1
585. Add -webkit-touch-callout?	1
586. column combination	1
587. document.importNode	1
588. Magnetometer support	1
589. Accelerometer sensor	1
590. Gyroscope sensor	1
591. New filesystem api?	1
592. Add Object.prototype.watch method	0
593. Add Object.getNotifier(obj)	0
594. HTML5 constraint validation API - setCustomValidity	0
595. marquee	0
596. Add Background Sync	0
597. HTML DOM selectedIndex attribute (drop-down list)	0
598. window.frames list	0
599. CSS pitch and speech-rate	0
600. documentMode	0
601. window.screen	0
602. input type password not included	-2