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FF135 ExprFeat - Prioritized Task Scheduling API disabled in preview #37289

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Dec 20, 2024
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FF135 ExprFeat - Prioritized Task Scheduling API disabled in preview #37289

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FF135 ExprFeat - Priorty shced API disabled in preview
hamishwillee Dec 20, 2024
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FF135 Relnote - Add info about disabling
hamishwillee Dec 20, 2024
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42 changes: 39 additions & 3 deletions files/en-us/mozilla/firefox/experimental_features/index.md
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Original file line number Diff line number Diff line change
Expand Up @@ -1743,10 +1743,46 @@ See [Firefox bug 1697647](https://bugzil.la/1697647) for more details.

### Prioritized Task Scheduling API

The [Prioritized Task Scheduling API](/en-US/docs/Web/API/Prioritized_Task_Scheduling_API) provides a standardized way to prioritize all tasks belonging to an application, whether they defined in a website developer's code, or in third party libraries and frameworks.
The [Prioritized Task Scheduling API](/en-US/docs/Web/API/Prioritized_Task_Scheduling_API) provides a standardized way to prioritize all tasks belonging to an application, whether they defined in a website developer's code, or in third party libraries and frameworks. ([Firefox bug 1734997](https://bugzil.la/1734997))

This is enabled on Firefox Nightly (only) from Firefox 101.
No preference is provided to allow it to be enabled in other releases.
This feature was enabled on Firefox Nightly in Firefox 101.
Support in Firefox Nightly 135 has been temporarily disabled in order to avoid [breakage in-the-wild](https://bugzil.la/1937232).

<table>
<thead>
<tr>
<th>Release channel</th>
<th>Version changed</th>
<th>Enabled by default?</th>
</tr>
</thead>
<tbody>
<tr>
<th>Nightly</th>
<td>101</td>
<td>No</td>
</tr>
<tr>
<th>Developer Edition</th>
<td>101</td>
<td>No</td>
</tr>
<tr>
<th>Beta</th>
<td>101</td>
<td>No</td>
</tr>
<tr>
<th>Release</th>
<td>101</td>
<td>No</td>
</tr>
<tr>
<th>Preference name</th>
<td colspan="2"><code>dom.enable_web_task_scheduling</code></td>
</tr>
</tbody>
</table>

### Notifications API

Expand Down
5 changes: 5 additions & 0 deletions files/en-us/mozilla/firefox/releases/135/index.md
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Expand Up @@ -66,6 +66,11 @@ This article provides information about the changes in Firefox 135 that affect d

These features are newly shipped in Firefox 135 but are disabled by default. To experiment with them, search for the appropriate preference on the `about:config` page and set it to `true`. You can find more such features on the [Experimental features](/en-US/docs/Mozilla/Firefox/Experimental_features) page.

- **Prioritized Task Scheduling API**: <code>dom.enable_web_task_scheduling</code>.
The [Prioritized Task Scheduling API](/en-US/docs/Web/API/Prioritized_Task_Scheduling_API) provides a standardized way to prioritize all tasks belonging to an application, whether they defined in a website developer's code, or in third party libraries and frameworks.
This has temporarily been disabled in Nightly builds in order to avoid [breakage in-the-wild](https://bugzil.la/1937232).
([Firefox bug 1938242](https://bugzil.la/1938242)).

## Older versions

{{Firefox_for_developers}}
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