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