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Forums -> UltraMon™ -> Firefox Tabs disappear or appear on the line below randomly
Mark   2013-04-15 20:09
Not sure if this is a Firefox bug or Ultramon, but often in FF20 my tabs disappear - for example, if I drag a tab off to create a new window on another momitor. If I then use Ultra's button to swap windows and back again and create a new tab (by clicking FF button, New Tab, New Tab) the tabs reappear but aligned below the title bar. Clicking Ultra's swap window button again will move FF to the other monitor and the tabs will appear where they normally should be.

Ultramon version 3.2.2
(Second adapter is Startech USB)

2 monitors
Current desktop: 3280x1200 (-1600,0 - 1680,1200)

Monitor 1 - DELL 2007WFP (primary):
Settings: 1680x1050, 32-bit color, 59 Hz refresh rate
Coordinates: 0,0 - 1680,1050. Workspace: 0,0 - 1680,1020
Video card: Intel(R) HD Graphics
Device: \\.\DISPLAY2\Monitor0

Monitor 2 - DELL 2001FP:
Settings: 1600x1200, 32-bit color, 60 Hz refresh rate
Coordinates: -1600,0 - 0,1200. Workspace: -1600,0 - 0,1170
Video card: Intel(R) HD Graphics
Device: \\.\DISPLAY1\Monitor0
Christian Studer   2013-04-16 06:32
My guess would be an issue with Firefox (because dragging the tab off the main window causes the problem), if you want to test if the issue is related to UltraMon try disabling window buttons, menu commands and dragging of maximized windows for Firefox via UltraMon Options > Compatibility, this way UltraMon won't install a hook in Firefox.

I did some testing with UltraMon 3.2.2 and Firefox 20.0.1 on 64-bit Windows 8, but so far haven't seen the issue.

Christian Studer - www.realtimesoft.com
David   2013-04-16 11:34
Can you reproduce the problem in FF 19.0.2?

In FF19 and/or FF20:
Do you get the same behavior when you
use Help->Restart with Add-ons Disabled?
Mark   2013-04-16 22:26
Hi Christian,
yes disabling dragging of maximized windows appears to work. I re-enabled the UM buttons and they work fine.
I have torn off tabs and re-merged them, swapped windows and min/maximized. All is working ok.
Thanks for your help.
Forums -> UltraMon™ -> Firefox Tabs disappear or appear on the line below randomly

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