Open Bug 1640659 Opened 4 years ago Updated 2 years ago

[UX] The tab-switch-warning needs to be dismissed to be showed again


(Firefox :: Site Permissions, enhancement, P2)

78 Branch



Tracking Status
firefox76 --- disabled
firefox77 --- affected
firefox78 --- affected


(Reporter: danibodea, Unassigned)


(Blocks 2 open bugs)



(1 file)


  • If the user starts screen-sharing and then clicks on another tab, he will see the tab-switch-warning. While the tab-switch-warning is being displayed, if he clicks on another tab, the initial tab-switch-warning is being dismissed and another tab-switch-warning is not displayed.

Affected versions

  • nightly v78.0a1
  • beta v77.0b9

Affected platforms

  • Windows 7
  • Windows 10
  • Mac OS 10.12
  • does NOT occur on Ubuntu 18

Steps to reproduce

  1. Engage in a video conference.
  2. Start screen-sharing.
  3. Click on another tab.
    (there's bug 1640134, so the step needs to be repeated if the fix is not in build)
  4. Click on yet another tab.
    Observe that the tab-switch-warning is displayed.
  5. While the tab-switch-warning is displayed, click on another tab.

Expected result

  • The tab-switch-warning for the other tab is shown.

Actual result

  • The initial tab-switch-warning is dismissed and the tab-switch-warning for the second tab is not snown.

Regression range

  • This is a feature implementation issue.

Additional notes

  • This appears to occur on Windows, and Mac, but not on Linux.
  • This description might suffer changes/updates before the feature testing is completed.
Group: mozilla-employee-confidential
Severity: -- → S4
Priority: -- → P2
Group: mozilla-employee-confidential
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