Suggestion	Votes
1. Add HTTP 103 Early Hints	57
2. css/svg property dominant-baseline	43
3. Suggestion: MediaRecorder.isTypeSupported supported types/codecs	41
4. TLS ECH (Encrypted Client Hello), formerly known as ESNI (Encrypted Server Name Indication)	39
5. Add support for DNS RRs, like HTTPS and SVCB	39
6. + WASM SIMD	35
7. Entries for href values including `tel:1234567` and `sms:1234567`	32
8. WebExtensions (browser extensions)	31
9. Hyphenation Options	28
10. Add WebDriver	27
11. CSS3 module "Generated Content for Paged Media" and especially the target-counter function	27
12. Can I use Reporting API	25
13. Show Support for JSON Modules	24
14. External import maps	23
15. JavaScript: Tail Call Support information missing	23
16. border-corner-shape	23
17. Priority hints API	23
18. [Request] Please add Web Assembly Garbage Collection (WasmGC)	23
19. Native HTML Switches	23
20. Add CSS property `caret-shape` and shorthand `caret`	22
21. XSLT Support table	22
22. Add CSS Grid Layout Module Level 3 (Masonry!)	21
23. I suggest adding statistics for Aural style sheets which contain CSS properties such as "speak....	21
24. Add ES7/2016 SIMD	21
25. New feature: CSS Typed Object Model (CSS Typed OM)	20
26. Add ShadowRealm API	19
27. device-cmyk css feature	19
28. Add CSS `field-sizing` (previously `form-sizing`)	19
29. Geo URI scheme	18
30. Page Lifecycle API	18
31. Support constructible stylesheets / adoptedStyleSheets	18
32. `content: leader('.');`	17
33. SVGZ-specific support table since iOS < 4.2 doesn't support it, but does support SVG. Not su...	16
34. Check browser support for displaying MJPEG files. This is a motion JPEG file format that is supporte...	16
35. ElementInternals/form-associated custom element	15
36. Support Intrinsic Size Attribute	15
37. Add Webassembly Threads / Threaded Webassembly	15
38. New feature request: OCSP must-staple	14
39. input-security	14
40. CSS 3 property: text-autospace and text-spacing	14
41. Color Fonts including SVG-in-OT fonts	13
42. Async iterators / for await of	13
43. Add the Popover API (ex: Pop Up API aka. the `popup` attribute plus more)	13
44. I suggest support for TransferableObject types (of which there are several)	13
45. Add Web Share Target API	13
46. Add tracking for Explicit Resource Management (`using` and `await using`)	12
47. webM alpha transparency	12
48. Add float: footnote to CSS3	12
49. Support for SVG's "shape-rendering" CSS property.	12
50. Soft hyphen: html entity &shy;	12
51. Page-margin boxes (@top-center, etc)	12
52. WebP & AVIF favicons	12
53. Add: Webassembly Garbage Collection	12
54. CSS Box Alignment Module Level 3	12
55. CSS3 Speech Module Which browsers support it? See	11
56. Tiff image format	11
57. Add "outline follows border-radius"	11
58. Add `WebOTP` to list of apis	11
59. Add WebRTC insertable streams	11
60. Add the `<search>` element	11
61. Add caniuse data for Contact Picker API	11
62. Add the Quite OK Image Format (QOI) …maybe eventually	11
63. Track Intl.Segmenter	10
64. Badging API	10
65. @font-face descriptors to override font metrics	10
66. caniuse : Constructable Stylesheet	10
67. queueMicrotask support	10
68. Add Web Share Level 2	10
69. Add Report-To API (Intervention Reports)	10
70. Support CSS two-value display syntax	10
71. Add supported elliptical curves (HTTPS/TLS)	10
72. one-time-code	10
73. webcl?	10
74. Add CSS Custom Highlight API	10
75. SVG viewport-fill property support	10
76. Progressive JPEGs start to show on pages faster, from low quality and eventually getting their 100% ...	10
77. Include `baseline-shift` CSS property	10
78. Add the HTML focusgroup attribute	9
79. Add CSS animation timing function spring()	9
80. SVG viewport-fill-opacity property support	9
81. Add SVG `use` with external reference	9
82. List support for the window.fetch keepalive option	9
83. Quota Management API	9
84. Add "HDR AVIF" image support	9
85. Cookies: max-age	9
86. -ms-overflow-style	9
87. HTTP2 Server Push	9
88. Add Versatile Video Coding (VVC) … somewhen	8
89. User-Agent Client Hints (UA-CH)	8
90. WebGL extensions	8
91. Add text-wrap: pretty	8
92. Add support for @starting-style rule	8
93. Add CSS property -- `object-view-box`	8
94. input[autocomplete] (values besides on/off)	8
95. Add support for Private State Tokens	8
96. Add Incremental Font Transfer	7
97. RFC7692 Compression Extensions for WebSocket	7
98. Add `WebSocketStream` API	7
99. Please add "isInputPending()"	7
100. Add 'require-sri-for' CSP Directive	7
101. New feature request: x25519 Key Exchange	7
102. Alt-Svc header browser support info: consider adding	7
103. Add support for iterator helpers	7
104. HTML Modules	7
105. Add Fetch upload streaming	7
106. Add `multipart/x-mixed-replace`	7
107. Feature: Origin-bound one-time codes delivered via SMS	7
108. Secure Cookie flag	7
109. Add Web Neural Network (WebNN)	7
110. This regards adding support for the navigator.userAgentData	7
111. Audio codec - xHE-AAC / USAC	7
112. Support for the frame-ancestors directive	7
113. autocorrect for input fileds	7
114. MediaStream Image Capture	6
115. add Accessibility Object Model	6
116. USDZ file format	6
117. Support 'name' attribute on <details> ("Accordion pattern using name attribute on <details> elements")	6
118. Support for MHTML	6
119. Accelerated Shape Detection in Images	6
120. Add Invoker Commands, `command` & `commandfor` (previously: Invokers, `invoketarget` & `invokeaction`)	6
121. Add `enterkeyhint` attribute ("Enter Key Hint")	6
122. Add CSS Values and Units Module Level 4 Mathematical Expressions	6
123. Observable	6
124. Geofencing API	6
125. Add tracking for "Ultra HDR JPG"	6
126. Embedded color profiles in JPEG images.	6
127. Module Worker support	6
128. new CSS trigonometry functions	6
129. Add ECC certificates	6
130. WebCrypto Key Discovery	6
131. Add the `:modal` pseudo-class	6
132. Flag storage that is not available under private mode	6
133. CanIUse OpenSearch	6
134. Window Placement API	6
135. Cannot see |ImageCapture| entry in the web interface.	6
136. CSS tag {content: url()}	6
137. Add Web Share Target API Level 2	6
138. Add System Colors item	6
139. Input Events Level 1 and 2	5
140. Add HTTP method: QUERY	5
141. Add support tables for document.documentElement.clientWidth	5
142. Global Privacy Control (GPC) "Sec-GPC" HTTP header	5
143. roundRect	5
144. Adding Khronos gITF 2.0 for 3D models	5
145. CSS Round Display	5
146. Add "CICP in images"	5
147. Add "page based counters"	5
148. add window-inactive pseudo-class	5
149. webp2 support	5
150. Feature: A Well-Known URL for Changing Passwords	5
151. Add gRPC support	5
152. Tracking various WebAuthn features	5
153. Can I Use m4a?	5
154. Bundled HTTP Exchanges	5
155. Add font-palette-values	5
156. JS Self-Profiling API	5
157. navigator.isProtocolHandlerRegistered and .unregisterProtocolHandler	5
158. Add IPFS (Interplanetary File System) protocol to Caniuse	5
159. Add supports() queries on @import	5
160. viewport meta tag	5
161. Add Intl.DurationFormat	5
162. Support individual CSP rules	5
163. Add the `<model>` element	5
164. Payment Handler API	5
165. Graphite font support	5
166. mediagroup content attribute, MediaController object, VideoTrackList, AudioTrackList objects	5
167. Please track the various HTTP Set-Cookie options supported by browsers	5
168. Add raw sockets API	5
169. Add info about css user-modify and -webkit-user-modify:read-write-plaintext-only	5
170. HTTP Strict Transport Security Preload	5
171. CSS Shaders -	5
172. TCP Fast-Open. Now that Linux kernels enable this by default (and web servers likely won't be ...	5
173. Input type=email with "multiple" attribute	5
174. audio / video autoplay attribute and play function	5
175. SVG sprites with <symbol> and <use>	4
176. The !important css thing. It's very !important ;).	4
177. Add Memory64 browser feature	4
178. Support Experimental "ES Pipe Operator (|>)"	4
179. Support SVG width/height = auto	4
180. Add support for passwordrules input attribute	4
181. Support for Geometry Property (SVG 2.0) `r` in CSS	4
182. Support aria-hidden html property	4
183. Cache-Control	4
184. Support the W3 Web Annotation standard (W3C Recommendation)	4
185. filename*=UTF-8''...	4
186. Add server-timing as a trailer	4
187. Support information for horizontal-viewport-segments and vertical-viewport-segments	4
188. Playback of videos with alpha channel	4
189. New top level domains (TLD)	4
190. Accessibility of in-browser PDF Viewer	4
191. File Handling API	4
192. Add Local Font Access API	4
193. documentMode	4
194. Add Intl.DisplayNames	4
195. Web locks	4
196. webkit-calendar-picker-indicator	4
197. Add Media Session API Coverage Information	4
198. X25519Kyber768 Hybrid Post-Quantum Key Exchange for HTTPS	4
199. Snap Events: scrollsnapchange and scrollsnapchanging	4
200. Track the status of the JavaScript Promise Integration specification	4
201. CSS image() functional notation (e.g. for background-images etc). See	4
202. Add Cookie Store API	4
203. Safe Assignment Operator	4
204. For printing support for the size:landscape option to tell the browser what page orientation we want...	4
205. Arithmetic coded JPEG support	4
206. Scroll State container queries	4
207. Add meta "format-detection"	4
208. ::-webkit-file-upload-button	4
209. Support for Digital Goods API	4
210. [CSS Level 4 pseudo-class] :user-error	4
211. SameParty cookie attribute	4
212. Missing feature: Clipboard API supported mimetypes	3
213. Add `dynamic-range` media query	3
214. Content-Security-Policy: script-nonce	3
215. justify-content: space-around	3
216. Show ANSI escape code for console.log.	3
217. Add 'animated GIF as favicon'?	3
218. ECMAscript - static properties	3
219. Public class properties	3
220. Add "Window Controls Overlay"	3
221. Add Wide Color Gamut in 2D Canvas	3
222. Add CMYK Color Space	3
223. Add support for requestSubmit	3
224. Web bundles	3
225. No information about the `unselectable` HTML attribute.	3
226. Private Click Measurement (PCM)	3
227. dns.resolve	3
228. New browser feature: rest/spread in object literals	3
229. CSS multicol data is mixed with fragmentation	3
230. Add support for addHitRegion	3
231. getEventListeners not listed	3
232. Add CSS if() function	3
233. Video media in image contexts	3
234. Support for CSS3 background-repeat-x and background-repeat-y properties	3
235. Add information for the webcal and webcals protocols for subscribing to iCalendars	3
236. Support new global attribute: writingsuggestions	3
237. Let's add a page for box alignment	3
238. place-items shorthand for justify and align	3
239. add iframe.csp	3
240. Add "Responsive Video" aka. `media` attribute for `<source>` element in `<video>`	3
241. Add support for HTTP header X-Permitted-Cross-Domain-Policies	3
242. The "auto" value for the dir attribute, added in HTML5 to ease inserting text of unknown d...	3
243. IPv6 support in web browsers	3
244. display: table-caption?	3
245. CSS view-timeline supports	3
246. video codecs	3
247. Add block-step-size property for CSS	2
248. Add `::target-text` (from CSS Pseudo-Elements Module Level 4)	2
249. Add browser support for toggle()	2
250. onerror event on iframe	2
251. Support for hrefTranslate	2
252. Metadata name: MobileOptimized	2
253. Metadata name: HandheldFriendly	2
254. `from-image` as initial value of `image-orientation`	2
255. support destructuring assignment as separate es feature	2
256. Animating SVG paths using CSS	2
257. UTF-8 Dingbats	2
258. Input type=range with "multiple" attribute	2
259. Add "Scheduled Task API"	2
260. text-space-collapse	2
261. Bitmap images inside SVG files. Some browsers that support SVG, will not show embedded bitmap image...	2
262. HTTP Trailers	2
263. track support for the media query feature -ms-high-contrast	2
264. Drag and Drop API - ghost image with customizable opacity	2
265. CMAF	2
266. Track adoption of DOMFrameContentLoaded event	2
267. Add `letter-spacing` support for percentage values	2
268. Add pdf parameters support	2
269. Support for IAMF file format	2
270. A new page for Grid track animation should be added	2
271. Can I use X3D?	2
272. WebXR Hand Input Module - Level 1	2
273. Tooltip display on focus	2
274. Touch Icons (apple-touch-icon)	2
275. Add TPG image file format	2
276. Add Date.prototype.toTemporalInstant()	2
277. add secure payment confirmation (W3C)	2
278. Add Change Array by Copy methods	2
279. Add Container Units aka. Container Relative Lengths	2
280. x-webkit-speech	2
281. Support of sms: and mms: in mobile browsers is not clear	2
282. DNS-over-HTTPS (DoH)	2
283. Please add more detailed WebRTC features	2
284. add RTSP and RTSP 2.0 (Real Time Streaming Protocol)	2
285. Add auto-expand `<details>` for find-in-page and fragment navigations	2
286. Load event support on link nodes to show when a stylesheet is finished loading. See for a discussio...	2
287. stroke-linejoin support	2
288. "GeometryUtils" - part of the CSSOM. Provides much better position information than existi...	2
289. Show which browsers have a native CSV viewer	2
290. Request: nav-up, nav-down, nav-left, nav-right css3 properties	2
291. Add CSS4 Grid structural selectors	2
292. SVG symbols in CSS	2
293. Basic Authentication: AuthName directive	2
294. Add chrome.webrequests	2
295. What about showing support for various link attributes, like "subresource" or "dns-pr...	2
296. CSS word-break: 'auto-phrase' and 'manual'	2
297. Add VisualViewport.segments support data	2
298. setTimeout and setInterval callback parameters	2
299. rel="ar" support	2
300. Support KV Storage build-in module	2
301. Storage Access API	2
302. CSS touch-action level 2 values	2
303. Wildcard "*" support for Access-Control-Allow-Headers/Methods	2
304. Add PNG cursor	2
305. SSML	2
306. <semantics> element in MathML is not found in caniuse.com	2
307. Add Geolocation Sensor	2
308. Add Integrated Windows Authentication	2
309. Need full 3gp browser compatibility chart.Does it chrome browser supports 3gp format	2
310. Loading Signed Exchanges	2
311. string-set	2
312. getFilesAndDirectories	2
313. add "unicode property escapes"	2
314. Add information on context-stroke and context-fill	2
315. Add HTTP_ORIGIN feature	2
316. HTTP immutable responses	2
317. Device-Memory Client Hint & navigator.deviceMemory JS API	2
318. String.prototype.split() with a regex with grouping ( parentheses ).	2
319. add csp lv2 violation event	2
320. console.assert(boolean_expression)	2
321. SharedMemory/Atomics	2
322. Spatial Navigation support	2
323. SVG image auto height	2
324. Add the Javascript double asterisk power operator (**) to the list of supported features	2
325. Add app-region?	2
326. srcset/sizes attribute / picture element support in SVG	2
327. add captureVisibleTab	2
328. Directional focus navigation: the nav-up, nav-right, nav-down, nav-left properties	2
329. Add URL.canParse()	1
330. Add variable units	1
331. Add `@font-feature-values`	1
332. Browser support for displaying the unicode block "Combining Diacritical Marks for Symbols"	1
333. <meta name="apple-mobile-web-app-capable" content="yes" />	1
334. Add tracking for ASTC hdr profile	1
335. accesskey attribute on non-focusable elements (should cause a click element to fire	1
336. Add support for the HTTP header X-Download-Options	1
337. Add WebDriver BiDi	1
338. Support for XPath 2.0 (interesting for a lot of new functions, like base-uri(), matches() etc.)	1
339. Add `new Intl.DateTimeFormat().resolvedOptions().hour12`	1
340. Support for Unicode and spaces in URL	1
341. MediaStream Recording (	1
342. image-resolution. I've seen this as a good alternative for retina images as opposed to backgro...	1
343. Support data for Unicode flag on HTML pattern attribute	1
344. Add `PWA file handlers`	1
345. Suggestion for caniuse.com: Which browsers.versions support multiple tbody elements in a single table?	1
346. Missing `StorageQuota` support	1
347. import reflection for WASM	1
348. Add `blocking=render`	1
349. Add IndexedDB 3.0	1
350. script tag onerror attribute	1
351. Add Payment Request API 1.1	1
352. Add tech() function support (in @font-face src)	1
353. Character-based alignment in a table column using text-align	1
354. aria-labelledby	1
355. Missing computed property names	1
356. Add Gradient Interpolation Color Spaces	1
357. Web monetization	1
358. Suggestion: @font-face src OpenType collection support	1
359. CAA DNS record	1
360. Add selection.getComposedRange() feature check	1
361. SVG 2: inline-size property for text	1
362. Add: Tracking Preference Expression APIs	1
363. WebSerial	1
364. Suggestion: support for margin-collapse?	1
365. Please add support data for "CSS property: clip-path: inset()". Thank you!	1
366. SHA1 certificates	1
367. HTTP Content-encoding: LZFSE	1
368. Opus: Need data for MP4 and WebM containers	1
369. CSS generated images: Stripes	1
370. add micropub	1
371. `border-color: currentColor;`	1
372. Please add support for supported x509 extensions for ʜᴛᴛᴘꜱ certificates	1
373. Add "Controlling Font Display Per Font-Family via @font-feature-values"	1
374. Feature request: tc39 Explicit Resource Management	1
375. Add CSS `@property`	1
376. Add Isolated Web Apps (IWAs)	1
377. Support for VSR (Video Super Resolution) on Nvidia and Intel GPUs	1
378. Add `@supports at-rule`	1
379. Add `:local-link` pseudo selector	1
380. Add standalone MathML files in MML format	1
381. Add Device Posture API (formerly Screen Fold API)	1
382. Add WICG/compression-dictionary-transport	1
383. I suggest adding information about support for alternate HTTP methods such as PUT and PATCH.	1
384. udp: add feature	1
385. Add caret-animation	1
386. Add Structured Error Data for Filtered DNS	1
387. Suggestion | Safe Operator: ?=	1
388. CSS Values 3 `src()` function	1
389. WebAuthN: "prf" extension support	1
390. webauthn: Related Origin Requests (ROR)	1
391. Add Inference capabilities from browser.trial.ml	1
392. permessage-deflate	1
393. URLSearchParams.prototype.sort	1
394. add aria-required to caniuse, if not already there	1
395. Add Web Preferences API …maybe eventually	1
396. Add "Scoped Custom Element Registry" as it is now behind an experimental feature flag in Chrome	1
397. viewport-fit	1
398. Content-Security-Policy: navigate-to	1
399. Adding Managed Media Source	1
400. window.watchMedia()	1
401. Support of webkitAudioDecodedByteCount	1
402. [Suggestion] display: fullscreen	1
403. Textarea wrap attribute (off, soft, hard, virtual, physical)	1
404. 'font-size' descriptor for '@font-face'	1
405. Audio format: AC-3, eac3	1
406. X.509 Name Constraints	1
407. Javascript pseudoprotocol	1
408. Browser support for Running elements	1
409. CSS property media-controls-panel	1
410. 32-bit HDR PNG	1
411. Please add TLS certificate algorithms to caniuse	1
412. mediacapture-region	1
413. prefers-reduced-transparency CSS Media Query	1
414. Chained selectors	1
415. Add High Resolution Time Level 3	1
416. Add css-timing	1
417. aria-current	1
418. Add Web Translation API …maybe eventually	1
419. Support for CSS Color Module Level 5	1
420. [Feature Policy: sub-feature] Sandbox features	1
421. Add compatibility for FormData	1
422. Add Web MIDI 2.0 …maybe eventually	1
423. Add URL Protocol Handler Registration for PWAs	1
424. Add support information for font metric override descriptors	1
425. add CSS Extensions meant for renaming	1
426. Support for calc() in polygon and other shapes	1
427. Please add JavaScript string functions trimStart, trimEnd, trimRight, trimLeft	1
428. baseline-middle	1
429. bidi algorithm (for right-to-left Unicode characters)	1
430. FLoC support	1
431. request support for 'accept-charset'	1
432. Add `::-webkit-details-marker`	1
433. Add: "color" and "background-color" CSS on <option> elements	1
434. The event handler window.onscroll is missing	1
435. column combination	1
436. requestPostAnimationFrame browser support?	1
437. line-height support and the differences in rendering between webkit&trident and other engines.	1
438. browserconfig.xml support info	1
439. E4X: ECMAScript for XML	1
440. Add `media` attribute for `<meta>` element (for `<meta name="theme-color">`)	1
441. Add "specifying a color profile: the `@color-profile` at-rule"	1
442. missing HTTP TRACE method	1
443. Add entry for DTLS 1.3	1
444. How to show support for font-variation-settings within @font-face?	1
445. Refresh	1
446. Add Object.prototype.watch method	1
447. SHA2 certificates	1
448. Internationalized Domain Name	1
449. event.path	1
450. css animation on “content:” - works on chrome, doesn't work on Safari and Firefox	1
451. x-webkit-airplay	1
452. What is the browser support for the newly proposed "page-orientation" property?	1
453. Add layout-instability support	1
454. Information about WavPack audio format	1
455. InsertKey Behaviour Overwrite/Normal Mode	1
456. DeviceOrientation and DeviceMotion events on insecure origins	1
457. Audio Output Devices API: wd	1
458. Add support for svg fill-rule	1
459. Add Range.getBoundingClientRect browser support table	1
460. document type	1
461. Adding contain-intrinsic-size (suggestion)	1
462. Request: IPv6 proxy functions (myIpAddressEx and friends)	1
463. Add Support for MPEG-4 Part 2 SP/ASP	1
464. Drag and Drop API - move constraints	1
465. Add box-suppress	1
466. Add desynchronized (low latency canvas contexts)	1
467. Clean up css-touch-action	1
468. Streams API: transferable streams	1
469. iframe disallowdocumentaccess property	1
470. performance.measureMemory()	1
471. Support info for the <track> element	1
472. Add a footnote regarding HTMLAudioElement	1
473. auto Picture-in-Picture	1
474. Can you please add the Stack trace API that exists in V8	1
475. stroke-linecap support	1
476. Add support for CSS3 move-to property	1
477. sec-ch-prefers headers	1
478. longdesc attribute support	1
479. https mixed mode	1
480. date.toLocaleString support tracking plz?	1
481. Support HTJ2K	1
482. Add optional type syntax for JavaScript …maybe eventually	1
483. Add `Notification.prototype​.showTrigger️`	1
484. Report Retry-After header support	1
485. online/offline can also be used as events and are not covered by caniuse.com (only boolean property is covered)	1
486. Add CSS Toggles …maybe eventually	1
487. Suggested addition: navigator.cpuClass	1
488. Sec-Ch-wow64	1
489. Add page for relative path in HTTP Location	1
490. Support for Service Worker Life Cycle Events	1
491. Add a matrix entyre for opentype-with-cff2	1
492. Add Capture Handle	1
493. Add XSL to caniuse	1
494. create @Media Types	1
495. Add H2 ORIGIN frame support	1
496. Add `font-variant-emoji`	1
497. Add `target="_new"`	1
498. Add CSS Scroll Snap Module Level 2	1
499. Add "method of opting into following the visual order", currently `focus-order` …maybe eventually	1
500. Add Background Blur API	1
501. MPNG	1
502. reflected-xss missing	1
503. <object>.contentWindow Support	1
504. Add compatibility data for QuickTime video format	1
505. supported-color-schemes & prefers-color-scheme	1
506. nested calc() and var()	1
507. show support for namespacing; for example <svg: namespace	1
508. The xml:space attribute	1
509. window.localMediaStream is not listed	1
510. feature request: video/MP2T	1
511. please add the onsearch event	1
512. step property of input field with type datetime-local and time	1
513. CSS3 new text-transform keywords	1
514. Add MathML Core	1
515. Add windows-theme media query selector	1
516. CSS Inline Layout	1
517. Add Notification Triggers	1
518. Use of es6 import statements in workers	1
519. Add WebKit Tap Highlight Color (-webkit-tap-highlight-color)?	1
520. add onstorage	1
521. Add "Named function expressions"	1
522. Open search autodiscovery	1
523. Feature request: Token Binding Protocol	1
524. DownloadURL	1
525. IETF RFCs	1
526. add mouse event positions event.offsetX and event.offsetY	1
527. OfflineAudioContext	1
528. Request support data for bevelled="true" attribute in MathML	1