Suggestion	Votes
1. Add HTTP 103 Early Hints	58
2. Add support for DNS RRs, like HTTPS and SVCB	46
3. css/svg property dominant-baseline	43
4. TLS ECH (Encrypted Client Hello), formerly known as ESNI (Encrypted Server Name Indication)	42
5. Suggestion: MediaRecorder.isTypeSupported supported types/codecs	41
6. + WASM SIMD	35
7. Entries for href values including `tel:1234567` and `sms:1234567`	33
8. CSS3 module "Generated Content for Paged Media" and especially the target-counter function	31
9. WebExtensions (browser extensions)	31
10. Hyphenation Options	28
11. Add WebDriver	27
12. XSLT Support table	26
13. border-corner-shape	25
14. Can I use Reporting API	25
15. Native HTML Switches	25
16. [Request] Please add Web Assembly Garbage Collection (WasmGC)	25
17. Show Support for JSON Modules	24
18. External import maps	24
19. JavaScript: Tail Call Support information missing	23
20. Priority hints API	23
21. Add CSS property `caret-shape` and shorthand `caret`	23
22. Geo URI scheme	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)	21
26. Add ShadowRealm API	20
27. device-cmyk css feature	19
28. `content: leader('.');`	18
29. Page Lifecycle API	18
30. Support constructible stylesheets / adoptedStyleSheets	18
31. Add tracking for Explicit Resource Management (`using` and `await using`)	17
32. Check browser support for displaying MJPEG files. This is a motion JPEG file format that is supporte...	16
33. Add Webassembly Threads / Threaded Webassembly	16
34. New feature request: OCSP must-staple	15
35. Support Intrinsic Size Attribute	15
36. ElementInternals/form-associated custom element	15
37. input-security	14
38. CSS 3 property: text-autospace and text-spacing	14
39. Async iterators / for await of	14
40. Add the Quite OK Image Format (QOI) …maybe eventually	14
41. I suggest support for TransferableObject types (of which there are several)	13
42. Support for SVG's "shape-rendering" CSS property.	13
43. Color Fonts including SVG-in-OT fonts	13
44. Tiff image format	13
45. Add Web Share Target API	13
46. Add the Popover API (ex: Pop Up API aka. the `popup` attribute plus more)	13
47. WebP & AVIF favicons	13
48. Add HTTP method: QUERY	13
49. Add CSS Gap Decorations	13
50. CSS Box Alignment Module Level 3	12
51. Add float: footnote to CSS3	12
52. Page-margin boxes (@top-center, etc)	12
53. Add "outline follows border-radius"	12
54. Add "HDR AVIF" image support	12
55. Add: Webassembly Garbage Collection	12
56. Feature request: Matroska (MKV) video container	12
57. CSS3 Speech Module Which browsers support it? See	11
58. Progressive JPEGs start to show on pages faster, from low quality and eventually getting their 100% ...	11
59. Add supported elliptical curves (HTTPS/TLS)	11
60. Add caniuse data for Contact Picker API	11
61. Add WebRTC insertable streams	11
62. Add `WebOTP` to list of apis	11
63. Add the HTML focusgroup attribute	11
64. webcl?	10
65. Include `baseline-shift` CSS property	10
66. SVG viewport-fill property support	10
67. HTTP2 Server Push	10
68. Badging API	10
69. queueMicrotask support	10
70. Add Web Share Level 2	10
71. Add Report-To API (Intervention Reports)	10
72. one-time-code	10
73. caniuse : Constructable Stylesheet	10
74. Support CSS two-value display syntax	10
75. @font-face descriptors to override font metrics	10
76. Track Intl.Segmenter	10
77. Add CSS Custom Highlight API	10
78. Add Declarative Web Push	10
79. Quota Management API	9
80. SVG viewport-fill-opacity property support	9
81. -ms-overflow-style	9
82. Cookies: max-age	9
83. Add SVG `use` with external reference	9
84. Add CSS animation timing function spring()	9
85. List support for the window.fetch keepalive option	9
86. Add Versatile Video Coding (VVC) aka. H.266 … somewhen	9
87. input[autocomplete] (values besides on/off)	8
88. WebGL extensions	8
89. User-Agent Client Hints (UA-CH)	8
90. Add support for Private State Tokens	8
91. Add CSS property -- `object-view-box`	8
92. Add Incremental Font Transfer	8
93. Add text-wrap: pretty	8
94. Add support for @starting-style rule	8
95. Add support for iterator helpers	8
96. autocorrect for input fileds	7
97. RFC7692 Compression Extensions for WebSocket	7
98. Secure Cookie flag	7
99. Support for the frame-ancestors directive	7
100. Add `multipart/x-mixed-replace`	7
101. Add 'require-sri-for' CSP Directive	7
102. New feature request: x25519 Key Exchange	7
103. Alt-Svc header browser support info: consider adding	7
104. HTML Modules	7
105. Please add "isInputPending()"	7
106. Feature: Origin-bound one-time codes delivered via SMS	7
107. CanIUse OpenSearch	7
108. Audio codec - xHE-AAC / USAC	7
109. This regards adding support for the navigator.userAgentData	7
110. Add Web Neural Network (WebNN)	7
111. Add CSS Values and Units Module Level 4 Mathematical Expressions	7
112. Add "page based counters"	7
113. Add Fetch upload streaming	7
114. Add `WebSocketStream` API	7
115. Support Experimental "ES Pipe Operator (|>)"	7
116. Add Invoker Commands, `command` & `commandfor` (previously: Invokers, `invoketarget` & `invokeaction`)	7
117. X25519Kyber768 Hybrid Post-Quantum Key Exchange for HTTPS	7
118. webauthn: Related Origin Requests (ROR)	7
119. ECMAScript 2024 (ES15) summary page and feature support list	7
120. Embedded color profiles in JPEG images.	6
121. Geofencing API	6
122. Flag storage that is not available under private mode	6
123. Cannot see |ImageCapture| entry in the web interface.	6
124. CSS tag {content: url()}	6
125. Add ECC certificates	6
126. Observable	6
127. MediaStream Image Capture	6
128. WebCrypto Key Discovery	6
129. Module Worker support	6
130. Accelerated Shape Detection in Images	6
131. Add System Colors item	6
132. add window-inactive pseudo-class	6
133. add Accessibility Object Model	6
134. USDZ file format	6
135. new CSS trigonometry functions	6
136. Add Web Share Target API Level 2	6
137. Support for MHTML	6
138. webkit-calendar-picker-indicator	6
139. JS Self-Profiling API	6
140. Window Placement API	6
141. webp2 support	6
142. Playback of videos with alpha channel	6
143. viewport meta tag	6
144. Add tracking for "Ultra HDR JPG"	6
145. Add Memory64 browser feature	6
146. Support 'name' attribute on <details> ("Accordion pattern using name attribute on <details> elements")	6
147. Add "CICP in images"	6
148. Add the `<geolocation>` element	6
149. CSS Shaders -	5
150. TCP Fast-Open. Now that Linux kernels enable this by default (and web servers likely won't be ...	5
151. Input type=email with "multiple" attribute	5
152. HTTP Strict Transport Security Preload	5
153. Add info about css user-modify and -webkit-user-modify:read-write-plaintext-only	5
154. audio / video autoplay attribute and play function	5
155. Please track the various HTTP Set-Cookie options supported by browsers	5
156. documentMode	5
157. New top level domains (TLD)	5
158. Add raw sockets API	5
159. navigator.isProtocolHandlerRegistered and .unregisterProtocolHandler	5
160. Add support tables for document.documentElement.clientWidth	5
161. Input Events Level 1 and 2	5
162. CSS Round Display	5
163. Adding Khronos gITF 2.0 for 3D models	5
164. Payment Handler API	5
165. Support individual CSP rules	5
166. Add font-palette-values	5
167. Bundled HTTP Exchanges	5
168. Feature: A Well-Known URL for Changing Passwords	5
169. Tracking various WebAuthn features	5
170. Graphite font support	5
171. Can I Use m4a?	5
172. roundRect	5
173. Global Privacy Control (GPC) "Sec-GPC" HTTP header	5
174. Add the `<model>` element	5
175. Add supports() queries on @import	5
176. Add IPFS (Interplanetary File System) protocol to Caniuse	5
177. Add gRPC support	5
178. Add Local Font Access API	5
179. Add Intl.DurationFormat	5
180. Track the status of the JavaScript Promise Integration specification	5
181. add @mixin and @function	5
182. Add Web Install API	5
183. For printing support for the size:landscape option to tell the browser what page orientation we want...	4
184. CSS image() functional notation (e.g. for background-images etc). See	4
185. The !important css thing. It's very !important ;).	4
186. Support SVG width/height = auto	4
187. filename*=UTF-8''...	4
188. Cache-Control	4
189. [CSS Level 4 pseudo-class] :user-error	4
190. SVG sprites with <symbol> and <use>	4
191. Support the W3 Web Annotation standard (W3C Recommendation)	4
192. Arithmetic coded JPEG support	4
193. Add Media Session API Coverage Information	4
194. ::-webkit-file-upload-button	4
195. Support aria-hidden html property	4
196. Web locks	4
197. Add meta "format-detection"	4
198. Add Cookie Store API	4
199. Support for Digital Goods API	4
200. SameParty cookie attribute	4
201. Add server-timing as a trailer	4
202. Accessibility of in-browser PDF Viewer	4
203. File Handling API	4
204. Support information for horizontal-viewport-segments and vertical-viewport-segments	4
205. Support for Geometry Property (SVG 2.0) `r` in CSS	4
206. Add support for passwordrules input attribute	4
207. Let's add a page for box alignment	4
208. Browser support for Running elements	4
209. Snap Events: scrollsnapchange and scrollsnapchanging	4
210. Safe Assignment Operator	4
211. Scroll State container queries	4
212. Track `<input type="color" alpha>` support	4
213. Add CSS scroll-target-group	4
214. The "auto" value for the dir attribute, added in HTML5 to ease inserting text of unknown d...	3
215. Add 'animated GIF as favicon'?	3
216. Content-Security-Policy: script-nonce	3
217. Add support for addHitRegion	3
218. Add support for HTTP header X-Permitted-Cross-Domain-Policies	3
219. display: table-caption?	3
220. Support for CSS3 background-repeat-x and background-repeat-y properties	3
221. Video media in image contexts	3
222. Add information for the webcal and webcals protocols for subscribing to iCalendars	3
223. add captureVisibleTab	3
224. place-items shorthand for justify and align	3
225. add iframe.csp	3
226. SSML	3
227. IPv6 support in web browsers	3
228. getEventListeners not listed	3
229. add "unicode property escapes"	3
230. Public class properties	3
231. New browser feature: rest/spread in object literals	3
232. dns.resolve	3
233. Add support for requestSubmit	3
234. ECMAscript - static properties	3
235. Show ANSI escape code for console.log.	3
236. justify-content: space-around	3
237. Add `dynamic-range` media query	3
238. Missing feature: Clipboard API supported mimetypes	3
239. No information about the `unselectable` HTML attribute.	3
240. Private Click Measurement (PCM)	3
241. CSS multicol data is mixed with fragmentation	3
242. Web bundles	3
243. Add CMYK Color Space	3
244. Add Wide Color Gamut in 2D Canvas	3
245. Add "Window Controls Overlay"	3
246. CSS view-timeline supports	3
247. video codecs	3
248. Add "Responsive Video" aka. `media` attribute for `<source>` element in `<video>`	3
249. Support new global attribute: writingsuggestions	3
250. Add `:local-link` pseudo selector	3
251. Add `letter-spacing` support for percentage values	3
252. WebAuthN: "prf" extension support	3
253. Add HTMLPermissionElement	3
254. Add backdrop-filter: url()	3
255. CSS @function rule	3
256. Add WebMCP	3
257. Add Local Network Access to caniuse	3
258. Add `revert-rule` keyword	3
259. Add `html-in-canvas` proposal	3
260. Add browser support for toggle()	2
261. Bitmap images inside SVG files. Some browsers that support SVG, will not show embedded bitmap image...	2
262. What about showing support for various link attributes, like "subresource" or "dns-pr...	2
263. Touch Icons (apple-touch-icon)	2
264. Load event support on link nodes to show when a stylesheet is finished loading. See for a discussio...	2
265. image-resolution. I've seen this as a good alternative for retina images as opposed to backgro...	2
266. "GeometryUtils" - part of the CSSOM. Provides much better position information than existi...	2
267. UTF-8 Dingbats	2
268. Request: nav-up, nav-down, nav-left, nav-right css3 properties	2
269. Input type=range with "multiple" attribute	2
270. Support of sms: and mms: in mobile browsers is not clear	2
271. x-webkit-speech	2
272. Add CSS4 Grid structural selectors	2
273. Basic Authentication: AuthName directive	2
274. Can I use X3D?	2
275. onerror event on iframe	2
276. Animating SVG paths using CSS	2
277. HTTP Trailers	2
278. Drag and Drop API - ghost image with customizable opacity	2
279. console.assert(boolean_expression)	2
280. Add HTTP_ORIGIN feature	2
281. string-set	2
282. Internationalized Domain Name	2
283. SharedMemory/Atomics	2
284. Directional focus navigation: the nav-up, nav-right, nav-down, nav-left properties	2
285. CSS touch-action level 2 values	2
286. srcset/sizes attribute / picture element support in SVG	2
287. String.prototype.split() with a regex with grouping ( parentheses ).	2
288. Add app-region?	2
289. HTTP immutable responses	2
290. Device-Memory Client Hint & navigator.deviceMemory JS API	2
291. setTimeout and setInterval callback parameters	2
292. SVG symbols in CSS	2
293. getFilesAndDirectories	2
294. Need full 3gp browser compatibility chart.Does it chrome browser supports 3gp format	2
295. SVG image auto height	2
296. add csp lv2 violation event	2
297. Add PNG cursor	2
298. Spatial Navigation support	2
299. Storage Access API	2
300. Support KV Storage build-in module	2
301. Loading Signed Exchanges	2
302. Wildcard "*" support for Access-Control-Allow-Headers/Methods	2
303. <semantics> element in MathML is not found in caniuse.com	2
304. Add Geolocation Sensor	2
305. Add Integrated Windows Authentication	2
306. Add information on context-stroke and context-fill	2
307. Add the Javascript double asterisk power operator (**) to the list of supported features	2
308. rel="ar" support	2
309. Information about WavPack audio format	2
310. Track adoption of DOMFrameContentLoaded event	2
311. CMAF	2
312. track support for the media query feature -ms-high-contrast	2
313. Add `::target-text` (from CSS Pseudo-Elements Module Level 4)	2
314. support destructuring assignment as separate es feature	2
315. `from-image` as initial value of `image-orientation`	2
316. Metadata name: HandheldFriendly	2
317. Metadata name: MobileOptimized	2
318. Support for hrefTranslate	2
319. WebXR Hand Input Module - Level 1	2
320. Show which browsers have a native CSV viewer	2
321. stroke-linejoin support	2
322. add RTSP and RTSP 2.0 (Real Time Streaming Protocol)	2
323. Please add more detailed WebRTC features	2
324. Add Container Units aka. Container Relative Lengths	2
325. Add TPG image file format	2
326. Add chrome.webrequests	2
327. Add VisualViewport.segments support data	2
328. A new page for Grid track animation should be added	2
329. Add "Scheduled Task API"	2
330. text-space-collapse	2
331. Tooltip display on focus	2
332. Add block-step-size property for CSS	2
333. add secure payment confirmation (W3C)	2
334. Add Change Array by Copy methods	2
335. DNS-over-HTTPS (DoH)	2
336. CSS word-break: 'auto-phrase' and 'manual'	2
337. Add `@supports at-rule`	2
338. Add pdf parameters support	2
339. permessage-deflate	2
340. Support for IAMF file format	2
341. Add RFC 8879 TLS Certificate Compression	2
342. Add `clipboardchange` event	2
343. Add WebCGM	2
344. Add inner-spin-button and outer-spin-button	2
345. CSS value random()	2
346. Add OAC codec	2
347. Add CSS `text-decoration-skip-spaces`	2
348. Add headingoffset and headingreset	2
349. Textarea wrap attribute (off, soft, hard, virtual, physical)	1
350. Support for XPath 2.0 (interesting for a lot of new functions, like base-uri(), matches() etc.)	1
351. <meta name="apple-mobile-web-app-capable" content="yes" />	1
352. accesskey attribute on non-focusable elements (should cause a click element to fire	1
353. MediaStream Recording (	1
354. script tag onerror attribute	1
355. Suggestion for caniuse.com: Which browsers.versions support multiple tbody elements in a single table?	1
356. create @Media Types	1
357. longdesc attribute support	1
358. CSS Inline Layout	1
359. IETF RFCs	1
360. Feature request: Token Binding Protocol	1
361. add onstorage	1
362. Add windows-theme media query selector	1
363. window.localMediaStream is not listed	1
364. The xml:space attribute	1
365. show support for namespacing; for example <svg: namespace	1
366. Add Object.prototype.watch method	1
367. browserconfig.xml support info	1
368. request support for 'accept-charset'	1
369. add CSS Extensions meant for renaming	1
370. Add a footnote regarding HTMLAudioElement	1
371. Support info for the <track> element	1
372. Drag and Drop API - move constraints	1
373. Audio Output Devices API: wd	1
374. DeviceOrientation and DeviceMotion events on insecure origins	1
375. Add Range.getBoundingClientRect browser support table	1
376. document type	1
377. Add box-suppress	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. Missing `StorageQuota` support	1
388. aria-labelledby	1
389. SHA1 certificates	1
390. Add support for the HTTP header X-Download-Options	1
391. add micropub	1
392. [Suggestion] display: fullscreen	1
393. Add High Resolution Time Level 3	1
394. Add css-timing	1
395. aria-current	1
396. add aria-required to caniuse, if not already there	1
397. URLSearchParams.prototype.sort	1
398. Add "Controlling Font Display Per Font-Family via @font-feature-values"	1
399. Please add support for supported x509 extensions for ʜᴛᴛᴘꜱ certificates	1
400. Chained selectors	1
401. Javascript pseudoprotocol	1
402. Browser support for displaying the unicode block "Combining Diacritical Marks for Symbols"	1
403. Support for Unicode and spaces in URL	1
404. Support data for Unicode flag on HTML pattern attribute	1
405. HTTP Content-encoding: LZFSE	1
406. Suggestion: support for margin-collapse?	1
407. Add: Tracking Preference Expression APIs	1
408. Missing computed property names	1
409. Character-based alignment in a table column using text-align	1
410. [Feature Policy: sub-feature] Sandbox features	1
411. window.watchMedia()	1
412. Add compatibility for FormData	1
413. Add H2 ORIGIN frame support	1
414. Add a matrix entyre for opentype-with-cff2	1
415. Support for Service Worker Life Cycle Events	1
416. Suggested addition: navigator.cpuClass	1
417. online/offline can also be used as events and are not covered by caniuse.com (only boolean property is covered)	1
418. Report Retry-After header support	1
419. date.toLocaleString support tracking plz?	1
420. https mixed mode	1
421. Add page for relative path in HTTP Location	1
422. OfflineAudioContext	1
423. DownloadURL	1
424. Use of es6 import statements in workers	1
425. CSS3 new text-transform keywords	1
426. step property of input field with type datetime-local and time	1
427. please add the onsearch event	1
428. supported-color-schemes & prefers-color-scheme	1
429. <object>.contentWindow Support	1
430. Refresh	1
431. How to show support for font-variation-settings within @font-face?	1
432. The event handler window.onscroll is missing	1
433. baseline-middle	1
434. Please add JavaScript string functions trimStart, trimEnd, trimRight, trimLeft	1
435. Support for calc() in polygon and other shapes	1
436. Request: IPv6 proxy functions (myIpAddressEx and friends)	1
437. Clean up css-touch-action	1
438. Add desynchronized (low latency canvas contexts)	1
439. Add Support for MPEG-4 Part 2 SP/ASP	1
440. x-webkit-airplay	1
441. What is the browser support for the newly proposed "page-orientation" property?	1
442. Add layout-instability support	1
443. InsertKey Behaviour Overwrite/Normal Mode	1
444. Add support for svg fill-rule	1
445. css animation on “content:” - works on chrome, doesn't work on Safari and Firefox	1
446. Adding contain-intrinsic-size (suggestion)	1
447. Streams API: transferable streams	1
448. iframe disallowdocumentaccess property	1
449. performance.measureMemory()	1
450. auto Picture-in-Picture	1
451. Add support information for font metric override descriptors	1
452. bidi algorithm (for right-to-left Unicode characters)	1
453. FLoC support	1
454. Add `::-webkit-details-marker`	1
455. Add: "color" and "background-color" CSS on <option> elements	1
456. Add URL Protocol Handler Registration for PWAs	1
457. requestPostAnimationFrame browser support?	1
458. E4X: ECMAScript for XML	1
459. Add `media` attribute for `<meta>` element (for `<meta name="theme-color">`)	1
460. Add "specifying a color profile: the `@color-profile` at-rule"	1
461. missing HTTP TRACE method	1
462. Add entry for DTLS 1.3	1
463. Can you please add the Stack trace API that exists in V8	1
464. stroke-linecap support	1
465. nested calc() and var()	1
466. feature request: video/MP2T	1
467. Add MathML Core	1
468. Add compatibility data for QuickTime video format	1
469. Add Notification Triggers	1
470. MPNG	1
471. Support HTJ2K	1
472. Add optional type syntax for JavaScript …maybe eventually	1
473. Add `Notification.prototype​.showTrigger️`	1
474. Add CSS Toggles …maybe eventually	1
475. sec-ch-prefers headers	1
476. Sec-Ch-wow64	1
477. Add Capture Handle	1
478. Add `font-variant-emoji`	1
479. Add `target="_new"`	1
480. Add CSS Scroll Snap Module Level 2	1
481. Add "method of opting into following the visual order", currently `focus-order` …maybe eventually	1
482. Add Background Blur API	1
483. Add Web MIDI 2.0 …maybe eventually	1
484. import reflection for WASM	1
485. Add `blocking=render`	1
486. Add IndexedDB 3.0	1
487. Add Payment Request API 1.1	1
488. Add tech() function support (in @font-face src)	1
489. Add `PWA file handlers`	1
490. Web monetization	1
491. Suggestion: @font-face src OpenType collection support	1
492. CAA DNS record	1
493. Add selection.getComposedRange() feature check	1
494. SVG 2: inline-size property for text	1
495. WebSerial	1
496. Please add support data for "CSS property: clip-path: inset()". Thank you!	1
497. Add Gradient Interpolation Color Spaces	1
498. Add WebDriver BiDi	1
499. Add URL.canParse()	1
500. Add `new Intl.DateTimeFormat().resolvedOptions().hour12`	1
501. Add tracking for ASTC hdr profile	1
502. Add variable units	1
503. Add `@font-feature-values`	1
504. Opus: Need data for MP4 and WebM containers	1
505. Add "Scoped Custom Element Registry" as it is now behind an experimental feature flag in Chrome	1
506. Content-Security-Policy: navigate-to	1
507. Adding Managed Media Source	1
508. CSS generated images: Stripes	1
509. Support of webkitAudioDecodedByteCount	1
510. 'font-size' descriptor for '@font-face'	1
511. Audio format: AC-3, eac3	1
512. X.509 Name Constraints	1
513. viewport-fit	1
514. 32-bit HDR PNG	1
515. Please add TLS certificate algorithms to caniuse	1
516. mediacapture-region	1
517. prefers-reduced-transparency CSS Media Query	1
518. Add Web Translation API …maybe eventually	1
519. Support for CSS Color Module Level 5	1
520. CSS property media-controls-panel	1
521. Add Web Preferences API …maybe eventually	1
522. Feature request: tc39 Explicit Resource Management	1
523. Add CSS `@property`	1
524. Add Isolated Web Apps (IWAs)	1
525. Support for VSR (Video Super Resolution) on Nvidia and Intel GPUs	1
526. Add standalone MathML files in MML format	1
527. Add Device Posture API (formerly Screen Fold API)	1
528. `border-color: currentColor;`	1
529. Add WICG/compression-dictionary-transport	1
530. udp: add feature	1
531. Add caret-animation	1
532. Add Structured Error Data for Filtered DNS	1
533. Suggestion | Safe Operator: ?=	1
534. CSS Values 3 `src()` function	1
535. Add Inference capabilities from browser.trial.ml	1
536. Request support data for bevelled="true" attribute in MathML	1
537. Add support for CRL	1
538. Add `::search-text` (& `::search-text:current`)	1
539. Add inherited value references	1
540. import.sync()	1
541. Add `<mapviewer>` (inline MapML)	1
542. hidden=until-found added to Safari	1
543. Add CSS Typed Arithmetic	1
544. Add Web Smart Card API	1
545. Add CSS Image Animation, currently `image-animation` & `:animated-image`	1
546. Add Web Printing API	1
547. Add the `<toolbar>` element	1
548. Add JS Import Text modules	1
549. JBIG2 image compression	1
550. Add Email Verification Protocol	1
551. Add "Out of order streaming with <template for>" (aka. patching)	1
552. Add CPU Performance API	1
553. WASM Stack switching	1
554. Add `application-context` CSS media feature	1
555. Add `window-drag`	1