[pull] main from mdn:main

.github/workflows/pr-test.yml

@@ -136,10 +136,10 @@ jobs:
 
           npx @mdn/rari build --no-basic --json-issues --data-issues "${ARGS[@]}"
 
-          # Workaround, as fred-ssr doesn't copy assets.
+          # Workaround, as `fred ssr` doesn't copy assets.
           cp -vR node_modules/@mdn/fred/out/. "$BUILD_OUT_ROOT"
 
-          npx --package=@mdn/fred fred-ssr
+          npx @mdn/fred ssr
 
           echo "Disk usage size of the build"
           du -sh $BUILD_OUT_ROOT

files/en-us/mozilla/firefox/experimental_features/index.md

@@ -79,6 +79,21 @@ The HTML [`<input type="color">`](/en-US/docs/Web/HTML/Reference/Elements/input/
 
 ## CSS
 
+### `circle()` and `ellipse()` allow `farthest-corner` and `closest-corner` keywords
+
+The `farthest-corner` and `closest-corner` keywords can now be used for specifying the radii values of the [`ellipse()`](/en-US/docs/Web/CSS/Reference/Values/basic-shape/ellipse) and [`circle()`](/en-US/docs/Web/CSS/Reference/Values/basic-shape/circle) CSS basic shapes.
+(See [Firefox bug 2037673](https://bugzil.la/2037673) for more details.)
+
+| Release channel   | Version added | Enabled by default? |
+| ----------------- | ------------- | ------------------- |
+| Nightly           | 153           | Yes                 |
+| Developer Edition | 153           | No                  |
+| Beta              | 153           | No                  |
+| Release           | 153           | No                  |
+
+- `layout.css.ellipse-corners.enabled`
+  - : Set to `true` to enable.
+
 ### Hex boxes to display stray control characters
 
 This feature renders control characters (Unicode category Cc) other than _tab_ (`U+0009`), _line feed_ (`U+000A`), _form feed_ (`U+000C`), and _carriage return_ (`U+000D`) as a hex box when they are not expected. (See [Firefox bug 1099557](https://bugzil.la/1099557) for more details.)

files/en-us/mozilla/firefox/releases/153/index.md

@@ -16,7 +16,11 @@ Firefox 153 is the current [Beta version of Firefox](https://www.firefox.com/en-
 
 ## Changes for web developers
 
-<!-- ### Developer Tools -->
+### Developer Tools
+
+- The developer tools now provide the heading level for a heading element in the accessibility highlighter and accessibility tree (previously just the fact that it was a heading was shown).
+  The information can be found in the [Accessibility Inspector panel](https://firefox-source-docs.mozilla.org/devtools-user/accessibility_inspector/index.html).
+  ([Firefox bug 1588784](https://bugzil.la/1588784) and [Firefox bug 2044904](https://bugzil.la/2044904)).
 
 ### HTML
 
@@ -154,3 +158,8 @@ You can find more such features on the [Experimental features](/en-US/docs/Mozil
 
   The {{cssxref("sibling-count")}} and {{cssxref("sibling-index")}} function are now supported. The `sibling-count()` function returns the number sibling elements as well as the element itself. The `sibling-index()` function returns the index number of the element in relation to its siblings, this starts from `1` and not `0`.
   ([Firefox bug 2042063](https://bugzil.la/2042063)).
+
+- **CSS basic shapes allow `farthest-corner` and `closest-corner` keywords** (Nightly): `layout.css.ellipse-corners.enabled`
+
+  The `farthest-corner` and `closest-corner` keywords can now be used for specifying the radii values of the [`ellipse()`](/en-US/docs/Web/CSS/Reference/Values/basic-shape/ellipse) and [`circle()`](/en-US/docs/Web/CSS/Reference/Values/basic-shape/circle) CSS basic shapes.
+  ([Firefox bug 2037673](https://bugzil.la/2037673)).

package.json

@@ -44,7 +44,7 @@
     "lint:typos-group-by-file": "cspell --no-progress --gitignore --quiet --reporter cspell-group-by-file-reporter --config .vscode/cspell.json \"**/*.md\"",
     "lint:typos-words-only": "cspell --no-progress --gitignore --words-only --unique --config .vscode/cspell.json \"**/*.md\"",
     "lint:yml": "prettier -c \"**/*.yml\"",
-    "start": "npm run --silent info:fred && npm run up-to-date-check && env-cmd --silent cross-env CONTENT_ROOT=files NODE_ENV=production FRED_PLAYGROUND_LOCAL=true FRED_PLAYGROUND_PORT=5043 FRED_PORT=5042 FRED_WRITER_MODE=true fred-server",
+    "start": "npm run --silent info:fred && npm run up-to-date-check && env-cmd --silent cross-env CONTENT_ROOT=files NODE_ENV=production FRED_PLAYGROUND_LOCAL=true FRED_PLAYGROUND_PORT=5043 FRED_PORT=5042 FRED_WRITER_MODE=true fred server",
     "test": "node --test",
     "up-to-date-check": "node scripts/up-to-date-check.js"
   },