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When Firefox has many tabs opened (more than 10), sometimes I can't swith between tabs using mouse, only Alt + Tab works. Why it hapeness?

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New User

When Firefox has many tabs opened (more than 10), sometimes I can't swith between tabs using mouse, only Alt + Tab works. Why it hapeness?

When Firefox has many tabs opened (more than 10), sometimes I can't swith between tabs using mouse, only Alt + Tab works.

Maybe the problem is because one of the opened pages contais flash advertisement. Please fix it

6 REPLIES
Site Moderator

Re: When Firefox has many tabs opened (more than 10), sometimes I can't swith between tabs using mouse, only Alt + Tab works. Why it hapeness?

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

  • Do NOT click the Reset button on the Safe mode start window or otherwise make changes.

You can check for problems caused by recent Flash updates and try these:

  • disable a possible RealPlayer Browser Record Plugin extension for Firefox and update the RealPlayer if installed
  • disable protected mode in Flash 11.3 and later
  • disable hardware acceleration in the Flash plugin
New User

Re: When Firefox has many tabs opened (more than 10), sometimes I can't swith between tabs using mouse, only Alt + Tab works. Why it hapeness?

Hi. I have tested firefox work in safe mode, NO problem occurred and I can switch tab using mouse. I have "Last-tab" (version: 3.0t3.1) add-ons installed on home and work pc and both pc has problem in switching tab.

How to fix this problem without removing "Last-tab"? Because it's very nice functionality when I can choose tab from the visual popup using Ctrl+Tab

Site Moderator

Re: When Firefox has many tabs opened (more than 10), sometimes I can't swith between tabs using mouse, only Alt + Tab works. Why it hapeness?

If you can confirm that "Last-tab" is causing the problem (i.e. it works with only that extension disabled) then you have no choice then disable this add-on for now until there is an update that addresses this issue.

If it works in Firefox Safe-mode then disable all extensions (Tools > Add-ons > Extensions) and then try to find which is causing it by enabling one extension at a time until the problem reappears.

Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")

New User

Re: When Firefox has many tabs opened (more than 10), sometimes I can't swith between tabs using mouse, only Alt + Tab works. Why it hapeness?

"If you can confirm that "Last-tab" is causing the problem"...

Yes, this problem cause "Last-tab" add-ons, because on my home pc I have only this extension and I can't switch between tabs using mouse, only Ctrl + Tab works.

Could you please inform "Last-tab" developers about this bug? What about include this functionality in the firefox as a default feature?

New User

Re: When Firefox has many tabs opened (more than 10), sometimes I can't swith between tabs using mouse, only Alt + Tab works. Why it hapeness?

Hi cor-el, are you from the firefox support? If not, how to escalate this problem to the firefox support team?

Support Forum Moderator

Re: When Firefox has many tabs opened (more than 10), sometimes I can't swith between tabs using mouse, only Alt + Tab works. Why it hapeness?

There is a support forum for the LastTab add-on here:
http://forums.timothyhumphrey.name/9.aspx