Diễn đàn hỗ trợ Firefox

Hello,

I'm writing because I’ve encountered an issue with the tab groups feature in Firefox.

Some time ago, after a browser update, I noticed a new feature that allowed me to group tabs thematically — I could name each group (e.g., "Study", "Work"), choose a color for it, and save and close groups to reopen them later. I found it very useful and used it a lot.

Last night, I decided to declutter my browser and closed several tab groups using the built-in menu. A bit later, I shut down my computer, but perhaps too quickly. This morning, when I turned my computer back on, Firefox was very slow to start. After a restart, everything seemed to work fine again, and the open tabs were restored.

However, all my previously saved (but temporarily closed) tab groups disappeared. In the tab group menu, I can now only see the ones currently open. I’ve searched through all the settings and history but cannot find any way to restore the missing groups.

Is there any way to recover the tab groups that I had previously saved and closed?

Thank you very much in advance!

Hi Guys, I have used Firefox browser to open and use Yahoo Finance for many years without any problems. On Wednesday 16th July 2025, suddenly, I could not download any stock charts. At first I thought it was a glitch with yahoo itself. However after a lot of searching and frustrating trial and error I seem to have pinpointed the problem to my Firefox browser. These charts will open as normal in Chrome. I have refreshed, uninstalled and reinstalled Firefox without success. Any ideas please?

Colin.

My old Firefox on my desk top has a home icon to go back to the home page. This new Firefox on my laptop doesn't seem to have one? What am I missing? How do I get back to the home page?

Yesterday I got a prompt saying there was an update available for download. Today when restarting my laptop and opening Firefox ALL of my bookmarks are missing!!! My bookmark toolbar is also empty. Where did all of this important stuff go? Please help me restore this my information asap. I am freaking out!

For 2 days now I am overwhelmed with Firefox Security alerts about everything from Trojan Horses to system warnings. I know they are fake, but they are driving me crazy. Can anything be done about them?

A few months ago, my Firefox browser became corrupted and I had to delete and re-install it. My browser now works, and I don't have any issues downloading new documents, but every document I'd downloaded on my first browser that was labelled a Firefox PDF document is now corrupted. I can work around it on my own computer, but if I try to email the documents to someone else they just get the corrupted file. I've tried converting the PDFs into a different type of document and then reconverting them to PDFs, but the PDF version is still corrupted. Is there any way to fix this? Or is my only option converting everything to a different type of document?

Literally every single extensions I try to download says Installation aborted because the add-on appears to be corrupt. I don't know why because I just downloaded firefox.

I am using version 140 on Linux and now two company sites do not work properly when "enhanced trakcing protection" is enabled. The 2 companies are "public mobile" a Cell phone provider and "Voip.ms" a phone provider.

When I log onto public mobile I cannot view my specific account information, I can see other menu information. voip.ms I cannot log on either chat or the main customer portal. This only recently changed within the last 4 days and I am using the same version of firefox.

Can you provide an explanation as to why this is occurring?

I need to add the extension icon back to the toolbar. It had quit functioning, so I removed it, and now I can't figure out how to add it back in. I also can't find an extension that will allow me to directly email a browser page.

Thank you!

When using Firefox in fullscreen mode (via F11) on Windows or Linux, moving the mouse to the top reveals the tab and address bar. but this causes the page content below to shrink temporarily.

In comparison, Chromium-based browsers handle this differently: their tab and address bars appear as overlays, without disturbing the layout or causing any viewport resize. This results in a more immersive and fluid fullscreen experience.

Please consider implementing a similar overlay behavior in Firefox's fullscreen mode, or at least providing a toggle via about:config to allow users to choose between current behavior and overlay-style tab reveal.

Tried to go to Amazon (I have a Prime acct.) on my desktop. Mozilla asked for my PIN. I don't have my PIN. Mozilla said go to Settings and Accounts to add a new PIN. I went to Firefox/Mozilla settings and could not find Account in order to get a PIN. I tried searching in Settings on Account; nothing. I scrolled and clicked around and could not find what I needed.

I am old but far from tech illiterate. I've worked on computers since the mid-1980s. I've had this sort of layered problem with Firefox before. Firefox has been my preferred browser since the 1990s, I believe. I appreciate the concerns with privacy and safety in browsing. But I've run into this sort of problem a number of times. I need to know how to address the PIN issue. I'm happy to get a new PIN if I could only find a way in the browser's settings to do just that.

And, by the way, the password I had for Firefox/Mozilla would not work, though I have it written down, know my entry was correct, keep my passwords in a safe place. I had to open my account on Firefox/Mozilla with Google, which, of course, meant entering another password and doing verification via iPhone. And, of course, I ended up entering with Google and the entry was associated with my secondary email address. That, unfortunately, is not the email address my Firefox/Mozilla account is associated with. It is associated with my primary email address.

All of this takes way more of my time, the customer's time, than I intended when all I wanted to do was open Amazon and print a return label on a product I had ordered. The ridiculous process has left me pretty pissed off.

Frankly, I'd be happy to simply enter my Amazon password to complete the task I need to complete, but Firefox is in the way! Please make your security add-ons clearer and more easily worked with. And please let me know how I can get a new blasted PIN! Of course, I will evidently have to change my Firefox/Mozilla password, as well, since you will no longer accept my current password that, BTW, was made in the past 6 months.

Ugh! Just recognized that I have to wait for another user to volunteer some sort of advice on this. That just makes me madder. I excised my actual email addresses, primary and secondary, from this message because I initially didn't realize this just goes out to a generalized community to see if anyone has something to offer.

Getting closer to abandoning Firefox.

My bookmarks have all disappeared, and while I have tried to follow the instructions on the help page to restore them, nothing is working as it has been indicated that it should in the help instructions. I do still have my Bookmarks tab on my tool bar. When I click on it I get a pull down menu, which does have a Manage BookMarks bar. However it is not at the bottom of my pull down menu, but at the top. When I click on the Manage BookMarks bar, instead of getting an Import and Backup Button, my pull down menu disappears, so I can not select Restore to use to get dated backups.

In the same way, I can not create new Bookmarks. When I click on Bookmark Current Tab, instead of getting the white box to enter instructions, the pull down menu disappears, just as it does when I click on Manage Bookmarks. I have never had this problem with Firefox before in all the years I have used it. I have no idea what has happened.

I wasn't sure what to select for the type of question so you can move it if you think another type would be better. I would have selected crashes but that isn't an option.

It happened again a few minutes ago while watching Star Trek First Contact. The Phoenix was about to go to warp and Firefox CTD with no crash reporter and when I looked in about:crashes there was no crash report. This exact situation happened twice while watching the movie Signal unknown or whatever the title is.

With the latest update, no matter if I've got it set to light or dark, the sidebar text and background are almost the same color. It's unreadable. There is no way to change just the sidebar, and it ignores the light/dark setting.