Firefox Community Forum

I'm using Firefox Developer Edition v136.0b5, and I'm looking for a way to remove “Turn on Vertical Tabs” from the contextual menu, because I'm so used to reopening a tab by clicking on what was then the last item in the list, that every time I end up with vertical tabs lol.

Note: Please read my reply to the post, below, for an update.

I like to have new tabs open at the end of my tab stream so that each new tab opens in consecutive order. This is only inconvenient when I have a lot of tabs and need to scroll to the end for the latest. Because I was working with a lot of tabs today I toggled the following to "true" in about:config —

browser.tabs.insertAfterCurrent = true browser.tabs.insertRelatedAfterCurrent = true

The issue I'm having is that after toggling back to false, new tabs continue to open after the current tab, rather than at the end as before.

I'm not clear on the difference between related and unrelated, so I've experimented toggling one on, one off and neither or both but for some reason the behavior continues to default to opening new tabs after current in each case.

I have also tried restarting both Firefox and the computer, but this has not had any effect, either.

I have included a screen shot of the present settings and behavior.

I have been using Simple Tab Groups (STG) for a long time now. I am curious if putting tabs into groups saves any resources, i.e. is only the open group using resources (CUP/RAM), or is STG purely organizational in that all the tabs still use the same amount of resources as if they weren't grouped? If it is the latter, do you know of an add-on that would save resources? Thanks

I'm running v138.0.1, but the ability to group tabs that was supposedly introduced in v137 is completely absent from my browser. I can neither drag tabs onto another to create a group, nor create groups by right clicking on a tab. What's up with that?

This code in mozilla.cfg used to overwrite new tab, but as of latest firefox 136.0b1 no longer works. Any way to fix this? There error in Browser Console.

// mozilla.cfg needs to start with a comment line var {classes:Cc,interfaces:Ci,utils:Cu} = Components;

/* set new tab page */ try {

 Cu.import("resource:///modules/AboutNewTab.jsm");
 var newTabURL = "file:///D:/Documents/images/home.html";
 AboutNewTab.newTabURL = newTabURL;

} catch(e){Cu.reportError(e);} // report errors in the Browser Console

I have two computers, one for personal use and one for business. Somehow the tabs between the two computers are being shared and I cannot disable it. Both browsers are signed into different Firefox accounts, Sync is turned off on both, and there are no connected devices. Yet despite that, when I go to one computer, it pops up a Firefox icon (see attached) in the taskbar that lets me open the tab open on the other computer. This is incredibly frustrating and Firefox should not automatically share this information, and should not make it so difficult to disable.

Is there a functionality to view Tabs Side-by-Side, or Vertical yet? Or is there a plan for it; similar to the recent version of Edge Chromium? I have read several questions; and their work-around solutions of using a side bar or sing two windows and arranging them side-by-side. Neither functionality offers synchronized scrolling. I used Tile Tabs or We Tabs add-on in the past which was great.

Hi,

In my Firefox Developer install the new tab groups feature seems to now be working like one would expect, but my main Firefox install (Firefox desktop 138.0 (64-bit)) has some issues.

I can add tab groups, add tabs to groups, but left mouse clicking the colored tab header does NOT close the tab group, like it does in Developer browser. Mode of tab group clearly changes, as the tab is either dark or light colored after a mouse click.

I don't remember changing any other settings lately in about:config, except setting tabs.groups feature to true, and I don't have too many extensions installed, and I also tried disabling all the extensions, but that didn't help.

Initial post: https://forums.debian.net/viewtopic.php?p=792869#p792869

cat history.log-* history.log | grep -i firefox -B2

Start-Date: 2024-02-11 19:48:58 Commandline: /usr/bin/unattended-upgrade Upgrade: firefox-esr:amd64 (102.15.0esr-1~deb11u1, 115.7.0esr-1~deb11u1)

before: https://support.mozilla.org/en-US/kb/search-open-tabs-firefox https://addons.mozilla.org/fr/firefox/addon/simple-tab-groups/ https://www.ghacks.net/2021/03/09/manage-container-tabs-efficiently-from-a-side-panel-with-the-container-tabs-sidebar-extension-for-firefox/ now: https://addons.mozilla.org/fr/firefox/addon/tab-stash/ https://www.majorgeeks.com/files/details/sidebar_tabs.html

How do I put bar between tabs, or, each tab inside an individual box ? I have tried many codes from various forums, but since this update, FF seems to ignore ./chrome/userChrome.css completely.

everytime I open firefox, it automatically switches tabs like these which require authentication to log in. even though their password is saved, I am still required to click in sign-in button.

Its really annoying that these kind of tabs get opened automatically, and then I have to switch back. Is there a way to disable this autoswitch or better, let the authentication happen automatically since the password is already stored ?

I was trying to change some settings on Firefox and I accidentally closed it and lost all of my tabs. I have the setting enabled to open tabs from last browsing session, but I was messing with the extension OneTab and I lost my open tabs.

Just to be clear, it wasn't the fault of OneTab, this is was my fault for closing Firefox too quickly when it was restoring my tabs and I didn't allow it to finish.

Anyway, in attempting to recover my tabs, I have restored from backup my "sessionrestore-backups" folder; this didn't work. I have also restored my entire Mozilla folder in my profile; this also didn't work.

I also tried following this article (https://support.mozilla.org/en-US/kb/how-restore-browsing-session-backup), but the sessionstore.jsonlz4 file doesn't exist. I did a search for this file in my profile and it doesn't exist anywhere.

Does anyone have any ideas that may help?

Thanks in advance!

Many, many months ago I did mundane search and opened a webpage in a new tab, as per normal. Nothing particularly stood out about this search and when I was done, I closed the tab. I didn't do anything different. I didn't save a bookmark or change any settings. I just looked at the webpage and then closed it when I was done. (It was a web article on some random tech site, if that matters)

Anyway, now whenever I open up my Firefox browser there seems to be a random chance that this previously closed tab will open on loading. And when I say random chance, I'd say about 1 in 5 chance. It doesn't always happen.

Just to be clear: I do have the browser set to restore my previous sessions. This is a setting I want to have on. However, this tab was not part of my previous session as I specifically closed it - and continue to close it every time it opens itself. Also, my Homepage is set to default and nothing else.

Not only that, but there are two very peculiar details about this case that make it very, very strange: 1. When I originally opened (and closed) this tab, I was using normal Firefox. I have since switched to Firefox Nightly. All of my other tabs that I like to keep open had to be searched and loaded up manually, one by one, after I did the switch. This one tab, however, is just showing up on its own. 2. Opening Firefox on a separate devices (second desktop PC, laptop, android phone) will occasionally load up this tab.

I do have my browsers set to sync, which is what I'm assuming is why it's following me around. But I don't understand why nor how to stop this specific page from loading after I keep closing it time and time again. Plus, why aren't any of my old tabs from my old Firefox browser following this same behavior after moving to Nightly? - I've closed hundreds, if not thousands of tabs. Why is this one following me around?

I have the most recent update and have been excited about tab groups, but it's still not working on mine. I thought the update would be available to all as of May 6, 2025. Is this happening to anyone else?

The option to restore tabs and windows is no longer working for me. I normally have a dozen tabs I work thru every day. Yesterday when I shutdown Firefox, all those tabs were there. Today when I open Firefox it only had to single Firefox default homepage. Checking under History there is no option to restore previous tabs, and the recently closed tabs was empty.

To test, I opened an IMDB page and pinned it. I then went to Wikipedia. This gave me a pinned and unpinned tab. I shutdown Firefox via the "X" to close the window. When I restarted Firefox there was only the default homepage. Neither IMDB nor Wikipedia showed up under recently closed tabs and no option to restore the previous session was available.

I have operated Firefox this way for several years. I don't know why this behavior is no longer being supported.

Hello, I closed my browser, expecting it to save my current tabs as it usually does. When I reopened it, the tabs were gone. They were important for me, and some of them were pretty old so I can't find them in my history. I tried checking the "recently closed tabs" option, it didn't help. There was also no option to restore the previous session. Can you help me restore my lost tabs?

My Firefox settings are configured to "Open previous windows and tabs" on Startup. This worked fine until this morning, when I lost all of the tabs in my session, including the pinned ones. The last time I closed Firefox, there was only one window open.

I have already tried these ideas to restore the tabs:

• CTRL+SHIFT+T: Does nothing
• CTRL+SHIFT+N: Does nothing
• Three bar menu -> History -> Recently closed tabs: The list is empty
• Three bar menu -> History -> Recently closed windows: The option is greyed out
• Three bar menu -> History -> Restore previous session: The option does not exist in the menu
• Open user profile folder and open sessionstore-backups folder: There are three files named "previous.jsonlz4", "recovery.baklz4" and "recovery.baklz4". They are each 2KB and contain only an empty tab with the URL "about:home". There are three additional files starting with "upgrade" but they are from too long ago, so they don't contain the tabs I require.

The contents of these tabs are vitally important for my work, so this is causing me significant stress. If anyone can suggest ways to recover my previous tab beyond the documented fixes, I would greatly appreciate it. Thank you so much to anyone who can help!

several weeks ago, i noticed that my tabs that i have had open for months no longer were present when i had occasion to reopen firefox after i had shutdown computer. i think it happened after update 98.0.2 was installed. i have searched help, etc. one solution that was my exact problem did not apply to me because the screenshots the contributor was using were not present on my version of the browser (or it is always possible that i was lost). this issue is a pain and i sure would appreciate any help thanks, Steve

"Container Tabs" are unavailable in Firefox on my employer's corporate PC. The "Enable Container Tabs" option is missing in the Tab section in Settings. There is a notification "Your browser is being managed by your organization." Thus, the lack of container tabs may be due to corporate policy. However, I don't see anything on the Active Policies page except one irrelevant record: "InstallAddonsPermission Default false." Additionally, "Container Tabs" are unavailable only in Firefox. Nightly has them. But, Nightly is not officially supported by my company. I have tested several corporate PC and different versions of Firefox and Nightly. Is it a weird Firefox bug or something else?

Hello, sadly I have the problem since a few days that firefox opens a new tab with the same error every time I google something or click on a new page/subpage etc. The URL on the error page is all the time "https://0.0.0.1/" mentention of course a page loading error. I don't know why firefox keeps oppening new tabs with this URL. I allrady tried to use the clearing function and even reinstalled the software, nothing worked. Maybe somebody can help me solving this problem, it is very annoying to have multiple new error-tabs per minute in a normal work flow. Thanks and best regards, Thomas