Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More
Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.
Réitithe Cartlannaithe

firefox closes tabs without warning

Firefox Troubleshooting
FredMcD replied
Jabberjaw
Jabberjaw

I have FF v51.0.1 32 bit for Win 10 Home 64bit. Usually I have about 5-10 browser tabs open simultaneously while surfing. Lately I find that FF closes earlier tabs on its own, without asking, and without my closing them myself. I must right-click and select "Undo Close Tab" to restore these tabs. In FF Options, I have unchecked "Warn me when closing multiple tabs" Any ideas what I need to do to keep this from happening?

I have FF v51.0.1 32 bit for Win 10 Home 64bit. Usually I have about 5-10 browser tabs open simultaneously while surfing. Lately I find that FF closes earlier tabs on its own, without asking, and without my closing them myself. I must right-click and select "Undo Close Tab" to restore these tabs. In FF Options, I have unchecked "Warn me when closing multiple tabs" Any ideas what I need to do to keep this from happening?
Jabberjaw
Jabberjaw Úinéir na ceiste
Read this answer in context

Réiteach Roghnaithe

Wellllllllp, turns out my galpal installed an Add-on, "Unload all tabs" which closes tabs after they're open a preset time. Problem solved!

All Replies (4)

FredMcD
FredMcD

Separate Security Issue: Update your Flash Player Note: Windows users should download the active_x for Internet Explorer. and the plugin for Plugin-based browsers (like Firefox).

Note: Windows 8 and Windows 10 have built-in flash players and Adobe will cause a conflict. Install the plugin only. Not the active_x.

Flash Player Version: 24.0.0.194

https://get.adobe.com/flashplayer/ Direct link scans current system and browser Note: Other software is offered in the download. <Windows Only>

https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, Win IE . . . .) Note: Other software is offered in the download. <Windows Only>

See if there are updates for your graphics drivers https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

FredMcD
FredMcD

Have you seen any pattern? What are the addresses of the closed tabs? How long are those tabs open when they are closed? Are you using any ad-blockers?

Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options) key, and then starting Firefox. A small dialog should appear. Click Start In Safe Mode (not Refresh).

Is the problem still there?

Jabberjaw
Jabberjaw Úinéir na ceiste

Réiteach Roghnaithe

Wellllllllp, turns out my galpal installed an Add-on, "Unload all tabs" which closes tabs after they're open a preset time. Problem solved!

FredMcD
FredMcD

That was very good work. Well done. Please flag your last post as Solved Problem so others will know.