I-Firefox Community Forum

I have lost my tabs after the recent update. They used to show all tab groups in toolbar icon as mentioned here (https://support.mozilla.org/en-US/kb/tab-groups) in manage tabs section. Only the groups that were open are retained, the groups which were closed are lost. They contained important tabs which I haven't bookmarked. I didn't see any policy of removal of inactive tab groups after certain time, any help would be really appreciated. I use the desktop app on Linux.

I go to:

General

Startup

I have the box selecting Open previous windows and tabs.

I close the window.

FIREFOX DOES NOT EVER SAVE MY PREVIOUS TABS. When I select

History

Then select: Recently closed tabs

Then select: Reopen all Tabs

NOTHING HAPPENS.

Yes, I'm a bit peeved at this because whenever I am stupid enough to close Firefox, I lose all my tabs. And it ain't just a couple tabs.

HELP??

Any Ideas what is going on? About July 21st, 2025 I started noticing with a couple of browser tabs open, a new tab opens autonomously and flitters in the new tab name area, what "looks like a TagID", then closes by itself. I define "looks like a TagID" as something that looks like a tag at end of article link in popular newsletters I see, and appears in the url bar of the linked article.

The occurrence of the new tab happens when I open the browser, within 1 minute and occurs randomly during the session, perhaps every 20 minutes.

My first suspect/assumption is I am always signed into Mozilla when I open Firefox 141.0 (64 bit), processing an update now, Aug 5 2025. I have subscriptions to VPN and Monitor and I have sync (passwords and bookmarks) with my mobile instance of Android Samsung Galaxy phone.

My Desktop is set up as Windows 11 pro with one employer InTune acount for Microsoft but I limit that work to Edge browser.

The AI tab thing is a problem for me for multiple reasons. I found various articles about how to turn it off. They pointed to the following setting: In about:config set the setting "browser.tabs.groups.smart.enabled" to false, and then restart Firefox.

However, when I do that, and then immediately go back to about:Config to check the setting, it has changed itself back to "true".

Other settings accept and keep permanent changes. This means that I'm not forgetting to save the change or anything. Just this one setting (which turns off something causing me problems) refuses to actually stay set.

I see the answer to this question https://support.mozilla.org/en-US/questions/1509077 and tried looking there. There is a completed study called "Smart Tab Groups Rollout", but since it is in the "Completed Studies" group, I cannot remove it.

Tabs are not restoring after session closed. I have tried the profile suggestion. I verified my settings say open tabs from last session. Rebooted. Cleared cache then opened tabs then closed and it keeps only opening one tab. It crashed last night with tabs on it and this was the results once I brought it back up.

Hi, I want to make a simple extension for Firefox that auto toggles vertical tab based on the aspect ratio of the Firefox window. I found `sidebar.verticalTabs` in about:config that toggles vertical tabs, but a simple googling tells me that it is not possible for web extension to modify about:config values. Is there any other API that toggle vertical tabs? Thanks!

When I click on a link, it opens in a new tab. I do not want the link to open in a new tab but to open in the current tab, how can I change to this please? Thanks, Andrew.

Hi! I often open many tabs in one window. The problem is that all the tabs do not fit in the tab bar. In another browser, the tabs get smaller as I open new tabs, and they all fit in the tab bar. In Mozilla, I have to use the arrows to move the group of tabs and find the one I need. This is not convenient. How can I make all the tabs fit in the tab bar?

Hello, I wanted to know if there will be new colors for tab groups soon. Maybe something like the ability to choose your own color via HEX code.

Have a nice day!

For a week my pinned tabs are lost every time I open Firefox. I have checked my settings, they were the same as always. I have de-selected them, closed and re-opened firefox, selected them again, closed and re-opened again, pinned my tabs again. Then closed and re-opened firefox and still they are not there. I have done this multiple time with the same results. This seems to have started after the last update.

Windows 10; Firefox 141.0

According to the "View recent browsing across windows and devices" command:

"Window 2 is current" and there is "Window 1" (which contains recent work)

My question(s):

How can I switch from window 2 (current) to window 1 (recent work)? and/or How can I combine both windows?

Thank you. (For your information, I have had a partial stroke, and I am 79 years old.)

I want to view more tabs across the top and opened about:config > browser.tabs.tabMinWidth > and changed value to 75. For the rest of the session it worked. Opening a new session and the tab width is 100 again. Help?

Losing my mind on this one.

Have 2 Macs I use at home, both running FF 141.0 and Sequoia 15.5.

Use Reader for RSS and Airmail for eMail. Both have settings to allow links clicked in those programs to open browser tabs in background. Handy way of banging through newsletters and RSS feeds before shifting to browser.

One on Mac, that open in battleground setting on both apps works as it has for, oh, last several years. On the other Mac, a few days ago that open in background stopped working with Firefox. It does work properly on Chrome and Safari if I set them as default browser (and, as I mentioned above, on my other Mac).

I've tried resetting Firefox on this Mac using the troubleshooting menu and have also cleared the Firefox cache. I even tried resetting the launch database in that Mac, although the fact Chrome and Safari are working fine suggests the OS isn't the culprit.

I'm unaware of having changed any settings, but am aware that "idiot user" may be the issue.

Regardless of how this happened, any ideas how to sort this annoyance out? Thanks!

I'm trying to replicate my windows setup in Fedora 42. I have been really liking the new vertical sidebar tabs option in windows. I have a lot of tabs and so rely on inertial scrolling to flick through them quickly.

However, there's odd behaviour with this in linux. With the window protocol set to xwayland, inertial scrolling on the sidebar tabs works, but inertial scrolling does not work in websites. Setting the window protocol to wayland (the general online recommendation to fix inertial scrolling), inertial scrolling in the tab list does not work, making them much less useful.

Within a few weeks or months, tabs I hadn't closed would suddenly disappear, even though I had checked the "Open previous windows and tabs" option in the settings.