Firefox Community Forum

I'm using 138.0.4 in MacOS 15.5. When I updated to MacOS 15.5 Firefox only saved one of three windows. The MacOS toolbar at the bottom no longer gives me the option of opening another window, or selecting another window already open. I like the old behavior better.

I am very used to switching tabs by using the keyboard so I usually do Ctrl+tab and I have it set to recent order (which makes sense to me because most of the time you switch back and forth between two or three tabs) to navigate between tabs. In some recent update, some tabs became unreachable by using this keyboard shortcut, as no more tabs are displayed nor do they appear when you reach the end of the list, forcing me to use the mouse to look for the tab (please see screenshot attached).

I was hoping this had a workaround or if it is a bug I would like to know how to report it.

Thank you!

Nicolas

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?

I lost all my tabs groups with the the update to release date for Firefox 138.0.4 on the 2025-05-19. Tab groups are still configured but my sessionstore.js is missing. I notice that there is a backup in Session-store backups dated the 2025-05-19 so I presume the tabs groups are still stored there. Can anybody suggest how to get the tab functionality back? I'm hesitant to just restore the sessionstore.js -- the actual tab group functionality is gone. I can't even recreate the groups.

Hello,

I dislike the Group Tabs feature. So many times I've accidentally created a Group Tab and then had to figure out how to un-group them.

I've tried to change the value of the "browser.tabs.groups.enabled" preference to false, but it doesn't stick; after restarting, the value is always back to "true".

What’s up with this?

Thanks, Andre’a

This is not an error, but it may be useful for some users of the Mac version of Firefox to know.

I have several tabs pinned to the left side of the tab bar (just the icons). Some of them I intend to use as "model" tabs to be duplicated for a session and the duplicate then deleted (such as bank logins).

I have found that, if I left-click to select a pinned tab and THEN right click and select Duplicate Tab, the duplicate appears immediately to the right of the pinned tabs, and to the left of any open non-pinned tabs. But if I right-click the pinned tab WITHOUT first left-clicking it, it goes to the right of the LAST non-pinned tab on the right.

This does not cause any errors, but it may be useful for some people to know; they can control where they want the duplicate tab to appear when they create it!

Hello, recently i reinstalled firefox and made a new profile from scratch because i thought the config: browser.search.context.loadInBackground did not work for me.

My problem: everytime i open a google tab (through context search or just a new google link) it opens in the background BUT then switches to it after like 1-2 seconds. this only happens with google links.

i have no idea what to do anymore, reinstalling did fix it till the last update i got today. now it is back.

Running Linux Mint 22 and FF 138.0.3. Normal practice is to leave 2 or 3 FF windows open on shutdown so the same windows and tabs will re-open on future boot-ups when opening FF. In the last several versions of FF as well as of the OS, those tabs appear on boot but display random text within a random tab for a given window. Also, the highlighted icon in the tray does not match the window that has opened. If I click and re-click the tray icons, they eventually display as expected.

Hello. I've created about 15 saved tab groups and would like to create many more, but the lack of sorting by name (and, some might like, last used) is a hurdle.

I've not found a way to sort these groups. Has anyone been able to or is it just not possible?

Thank you and enjoy a super day! 🌞

Just wondering, are the Tab Groups only saved locally or also on the Account? Have also heard that the Tab Groups feature has sometimes been disabled by itself, when re-opening Firefox, and they lost all their groups and had to enable the feature again. But I don't know anything else about that, and just would like to know, if the Tab Groups can be or are saved on the Mozilla Account.

Hi.

When I dragging a link over the tabs bar, I can drop it between 2 tabs; this will open a new tab for this link, which is a great feature. However if I (accidentally) drop it right onto an existing tab, that tab will be replaced with the new link; if the tab had anything important (could be a long, JS-loaded waterfall page), it will be gone. I have multiple bad experiences due to this bug/feature.

How to disable this?

I absolutely love the new tab groups on Firefox. I am a lawyer and i keep a TON of tabs open at the same time. I might be working on a case, and I can create all the tabs related to that case together, come back to it a day or more later.

I also open up a zillion news articles every day. Some are fun (Fun Articles Group), some are about our declining society (Rule of Law Group), some are about AI (AI Articles To Save), some are Case Law I save for my internal library (Case Law to Save Group).

The problem I am having is that each of the Windows where these various tabs are kept is are not seen by the Tab Names. So, if I go to my pinned Taskbar icons across the bottom of my screen, and toggle across the Firefox icon, the many different labels that pop up are ONLY the tab names.

That is, there is nothing reflecting the Group name to which the tab belongs. I just spent all this time grouping my tabs together in separate windows, and when I want to go quickly to one of those Windows (each Window has a Separate Group Name in my personal system), I cannot tell which one is which.

So, my recommendation is that Mozilla designate in the taskbar prompted tab items which Group each tab belongs to (if it is assigned to a Group). It would make toggling between the tabs sooooooo much easier and efficient.

Additionally, I love that when I assign a new item/tab to a Group, it automatically groups them with the other members/tabs in the Group. However, after a certain point, it gets ridiculous. Perhaps there can be an option where you can separate the Groups into two or more Windows (eg Group named Case Law to Save, if I have 10 different ones open, put the 11th one in a new Window, instead of just adding another tab to the ever-burgeoning Window full of tabs).

Maybe I am the only idiot who has so many tabs open that these issues are a problem. But the mere fact that Mozilla created the organizational tool of Groups suggests to me that I am not the only one who keeps a lot of tabs open at the same time.

I have no idea how to suggest this improvement to them. I am not a coder. I cannot contribute in this way.

Thanks to those who contribute to the improvement of this product! Michelle

firefoxで右クリックで新しいタブの短縮コードが作用しない事があります

firefoxで右クリックから新しいタブの短縮コードが作用しない事があります

新しいタブはキーボードTで割り振られてデフォルトと同じです、毎回ではなくたまにTで新しいタブが開かれることもあるのですが、反応しない事が大半です、最近になってなりました、edgeやchromeでも右クリックからTを押せば新しいタブが開かれます、firefoxに問題があるのでしょうか？

この場合はどうやって解決するのでしょうか？

More frequently than I care to admit, I seem to close FF instances which I don't want to close (such as my connection to Whatsapp). I then miss important replies or questions. Of course I can reach out to 'History' and try to find the closed Tab or Window... But that takes time.

I'd suggest adding/removing a 'protection' flag to a tab (eg. on right-clicking), so that, on trying to close the tab, or close the window containing the tab, I get a warning...

I dislike the tab groups feature cause I accidentally group up tabs and I find it annoying. I tried to disable it from about:config (browser.tabs.groups.enabled setting), but it turns back on every time I reopen firefox. I also opted out of all grouping related features in about:studies. Still can not disable the feature. How can I proceed?

I understand that in previous versions, there was a preference in about:config that would let me adjust the delay in ms that I would need to hover over a tab until its tab preview is shown. This preference is supposedly located at browser.tabs.cardPreview.delayMs but when I searched for it in about:config it did not show me any results. Any Google searches do not point me in the right direction either. Does anyone know what I could do to adjust this delay anyways?

Attached is an example of the tab preview I'm talking about.

Frequently, when I open Mozilla after the computer shuts down for the night, all of my tabs are gone, including my pinned tabs, which I would really like to be there. How do I fix this?