1780255 - After reloading an addon, the webextension toolbox navigates to the fallback window page

Status: NEW

(DevTools :: about:debugging, defect, P3)

Description

[Julian Descottes [:jdescottes]]

See comment at https://phabricator.services.mozilla.com/D151728#4979486

Use a webextension with a simple background script.

STRs:

• open about:debugging
• load the extension as a temporary extension
• notice that the webextension toolbox should be on the generated background page
• in about:debugging, reload the temporary extension

ER: The webextension toolbox should be reloaded on the generated background page
AR: The toolbox displays the fallback page in the toolbar.

Technically this happens because when we reload the extension, we will load the fallback page on docshell destroy at https://searchfox.org/mozilla-central/rev/fa71140041c5401b80a11f099cc0cd0653295e2c/devtools/server/actors/targets/webextension.js#294

A suggestion is to preload the fallback window to avoid this, but this would lead to show this window in the iframe picker all the time.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:jdescottes, could you have a look please?

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