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Bug-1881986 webRequest.onErrorOccurred fallback #43882

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Bug-1881986 webRequest.onErrorOccurred fallback #43882

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Bug-1881986 `webRequest.onErrorOccurred` fallback
rebloor Apr 21, 2026
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Merge branch 'main' into Bug-1881986-webRequest.onErrorOccurred-fall-…
rebloor Apr 21, 2026
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1 change: 1 addition & 0 deletions files/en-us/mozilla/firefox/releases/151/index.md
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Expand Up @@ -72,6 +72,7 @@ Firefox 151 is the current [Beta version of Firefox](https://www.firefox.com/en-

## Changes for add-on developers

- The {{WebExtAPIRef("webRequest.onErrorOccurred")}} event now falls back to `NS_ERROR_NET_ON_RECEIVING_FROM` instead of a string starting with `NS_ERROR_NET_ON_` or `NS_ERROR_NET_UNKNOWN_`. This change is part of performance and reliability improvements to the `onErrorOccurred` event. ([Firefox bug 1(https://bugzil.la/1881986))
- {{WebExtAPIRef("tabs.group()")}} and {{WebExtAPIRef("tabs.ungroup()")}} now correctly add and remove a split view when a call includes one of the split view's tabs. Previously, a call would fail or separate the split view. ([Firefox bug 2029099](https://bugzil.la/2029099))
- {{WebExtAPIRef("tabs.move()")}} now correctly moves a split view to the right when a call includes one of the split view's tabs. Previously, a call moved a split view only to the left or to the end of the tab list. ([Firefox bug 2027855](https://bugzil.la/2027855))

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