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[Brian <andersrb@xxxxxxxxx>]

Public bug reported:

In about:config set browser.ctrlTab.previews to true. Open more than two
tabs so that the tab preview window will open during navigation. Press
ctrl+tab.

I usually expect releasing ctrl+tab to close the preview and switch
tabs.

Instead, the tab preview opens, further presses of ctrl+tab cycle
through tabs, but releasing the keys does not close the preview window
and change tabs. I can press escape to close the window without
switching tabs, and I can click a preview to change tabs, but I can not
change tabs just by pressing and releasing ctrl+tab.

I also saw this behavior in the Mozilla nightlies on this machine.

I filed a bug with Mozilla too, but I believe it is Ubuntu-specific:
https://bugzilla.mozilla.org/show_bug.cgi?id=1154922

Description:    Ubuntu Vivid Vervet (development branch)
Release:        15.04

firefox:
  Installed: 37.0+build2-0ubuntu1
  Candidate: 37.0+build2-0ubuntu1
  Version table:
 *** 37.0+build2-0ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ vivid/main amd64 Packages
        100 /var/lib/dpkg/status

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to firefox in Ubuntu.
https://bugs.launchpad.net/bugs/1444788

Title:
  Pressing ctrl+tab does not switch tabs when browser.ctrlTab.previews =
  true

Status in firefox package in Ubuntu:
  New

Bug description:
  In about:config set browser.ctrlTab.previews to true. Open more than
  two tabs so that the tab preview window will open during navigation.
  Press ctrl+tab.

  I usually expect releasing ctrl+tab to close the preview and switch
  tabs.

  Instead, the tab preview opens, further presses of ctrl+tab cycle
  through tabs, but releasing the keys does not close the preview window
  and change tabs. I can press escape to close the window without
  switching tabs, and I can click a preview to change tabs, but I can
  not change tabs just by pressing and releasing ctrl+tab.

  I also saw this behavior in the Mozilla nightlies on this machine.

  I filed a bug with Mozilla too, but I believe it is Ubuntu-specific:
  https://bugzilla.mozilla.org/show_bug.cgi?id=1154922

  Description:    Ubuntu Vivid Vervet (development branch)
  Release:        15.04

  firefox:
    Installed: 37.0+build2-0ubuntu1
    Candidate: 37.0+build2-0ubuntu1
    Version table:
   *** 37.0+build2-0ubuntu1 0
          500 http://us.archive.ubuntu.com/ubuntu/ vivid/main amd64 Packages
          100 /var/lib/dpkg/status

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