Firefox Community Forum

Firefox is still freezing when entering incorrect info in the Google Sign-in page (when I try to sign in on www.youtube.com); - if I enter the wronglogin info & press enter, the firefox window becomes useless & I cannot cancel/close the window. & Help menu is greyed-out for the frozen window & any new window I open;

- i have to go to macOS' Activity Monitor & Force Quit the 'AuthenticationServicesHelper' (Firefox), then the window becomes responsive. This makes it impossible to use Firefox & if someone didn't know this, they wouldn't know how to fix it.

- this has been an ongoing issue & the previous time i submitted this, it was removed for "not being a question" (???) but it still important & I still hope it gets fixed someday?

We have a question about bookmarks sync, with specific characteristics, please.

We purchased another computer, a laptop, and wish to benefit from the bookmarks sync between them. However, we're affraid of a backward syncing situation. How can we make sure we prevent that?

For example, say we worked on the desktop for a week, and then need to use the laptop. What should we do when we turn the laptop on and open ff browser, if we wish to sync from the desktop to the laptop? Do we press the Sync button on the laptop? - or will that force a backward synching from the laptop to the desktop? If that's the case, than how do we sync reliabely? And let's say the day after, from the now-updated-laptop to the desktop? Is the safest way to do it by turning the sync option off, and copying the bookmarkbackup folder from one updated computer to the other?

Also, this may complicate things a bit - We use the browser bookmarks in a non traditional way. It's kind of an archive for us. The .jsonlz4 file size in bookmarkbackups folder is 37MB. We remember reading somewhere before, the server backups stores files up to 10MB. So, question is, does the large size or the bookmarks file will affect the synching process between computers?

Thank you very much! :)

I have enabled the option to open the previous windows and tabs. I had one window that I always closed last as it had a lot of groups that are important for my work, so it used to open every time I started Firefox. Sometimes, even if I closed the window by mistake without closing other windows, I was able to get it back by pressing ctrl+shift+n.

But yesterday, I might have closed it by mistake and when I pressed ctrl+shift+n , it didn't come back. I wasn't able to access my window and now it's all gone. I don't see anything in recently closed windows in history.

I need those tabs back as they are very important for my work. they were a lot of tabs. I had many groups but now all are gone. I tried by using the previous.jsonlz4 in the sessionstore-backup by renaming it in the default-release profile as sesstionstore.jsonlz4 but still wasn't able to access my window.

I didn't clear my history as the tabs opened in the window still show up in the history.

Kindly help as soon as possible

why everytime i open i new tab it appears in my shortcuts section i only pinned like two sites and evry time i open a new page it appears in the shortcuts and theres no setting that i can turn off

Desktop Computer. Still on Windows 10.

Not sure of category. This began when I launched the computer today. I opened Firefox and got the message "The bookmarks and history system will not be functional because ....."

When I started to shut down the computer (first mentioned step here) I saw there's a Window update. I selected Update and Restart. That went okay, but still don't have my Firefox bookmarks.

So I clicked on Learn more. I found the Firefox > Profiles folder. There are two folders, one from today - qkuxm6ws.default-release - 15...... 0196 with 94 items, and 7ghfiw 15.default, from Jan 5, 2021, with 3 items. I assume I should use the one with today's date.

BUT .... from this point, the information on this website was full of information - NOT step-by-step information telling me what to do with which files in this folder.

Also, I have McAfee as well as Windows Defender. I opened Windows Defender Firewall. State is On. Notification state: Notify me when Windows Defender Firewall blocks a new app. I've gotten no such messages.

Under allowed apps and features:

 "Firefox ... private not checked; public checked.."  
 "Firefox (C:\Program Files\Mozilla Firefox" - private is checked, public not checked.  

Can't make changes.

Under Overview window: Not checked is "Inbound connections that do not match a rule are blocked."

• • • • In the "Monitoring\Firewall folder" - Firefox (with path) is listed twice. Both entries have Private, Allow, NO Override -
      • Differences - the first has UDP; the second has TCP. Nothing under "Group."

My last bookmarks backup was Jan 2025. 😕 😟

I don't know where else to look or what to do. Please help. Kami

In my Firefox browser, when i try to sign in to Youtube, a window says "there was an issue signing in to Youtube" pops up. None of the troubleshooting articles are helpful for my situation. My Firefox browser is up to the latest update - version 146 on windows 11. Youtube works, but i am prevented from signing in to my account.

I have used Youtube in Firefox before by signing in to my google account, the only thing that has changed was that I went into settings and cleared my browsing history, cache, and cookies. Once those were cleared, Youtube won't sign me in and only shows that error window.

In my Firefox browser settings, I have set Youtube to accept cookies and have disabled adblock for Youtube.

My Youtube account is still accessible using Chrome, but not in Firefox. Youtube WILL sign me in if i use Firefox private browsing. I'd rather not use chrome since Firefox is my primary browser and I'd rather not jump through the extra steps of google sign-in using private browsing.

I do have a Google account with my school institution, but that has never been an issue (expect it won't open google maps for some reason, not the issue here though). My Youtube has always been signed in with my personal Gmail, not my school Gmail. I'm not sure if that's interfering with anything.

To reinstate the main issue: I cleared my browsing data and cookies, now Youtube in Firefox won't sign me in.

Firefox fails to show short cuts in browser page and verified shortcuts is checked and can't find top sites settings. I previously had this show up every time I open Firefox.

When I open Firefox it can't find my profiles when I go into the profile manager it shows no profiles. Going to my computer I find the profiles where they should be. However under program files there is a Mozilla Firefox normal directory. Did they recently change default install areas or did something else screw up.

I have done malware scans using Malwarebytes and spybot and my antivirus program and all comes up clean. Windows is up to date, Windows 11 most current preview. I can't tell you the current Firefox version since it won't open without the profile. I did just create a new profile and Firefox version is 147.0B7. also just recently right after what I think was an update that lost all my open windows and tabs and there is no way to restore them if there is a backup anywhere

For some reason, after a restart everything in the Firefox Gmail window suddenly increased in size --- the print, symbols, everything. See pic below. I don't know if is a Firefox or Gmail problem.

Any help you can give will be greatly appreciated!

Greetings Ya'll,

I have to apologize if this is a double post, but I came back to the forum, & wanted to see if there were any responses, but i could only find my post listed under "My Profile"/"My Questions".

My original post was made Dec. 19-2025

=======================================

Early this morning as I went to use the Firefox browser, on My Desktop, I got an update, & then firefox opened, somewhat.

The homepage did not fill in with favorites, suggestions, etc, and in fact all that did load was the Search bar, but not one of my usual website buttons. The "edit", "help", etc. buttons at the upper left hand corner did load, but that is all. Not one of the buttons work, nor can I close out the Firefox page, by tapping the "X" in the upper right hand corner.

The only way that I could close out the "Firefox Page" was by going through the "Control/Alt/Delete" & then "Signing Out", which would initiate a "Re-start". Once I signed in, I could return to the Desktop, where everything works.

I use Firefox as my Browser on my Android phone, & at this moment, I've not had any problems using Firefox on my Cell Phone.

The only way that I could get to the Mozilla Website was by using the Microsoft Edge Browser, which is not giving me any problems as far as accessing the Internet!

How can I correct this problem, & go back to the Firefox Browser?

Hello, today I have set up a new account for work and I have trouble signing in. Actually, I manage to sign in, however I am then shown the screen which gives me the option to create account recovery key and the browser freezes completely. I am unable to click on anything, the only option is to go to the Task Manager and kill the program there. Then, when I open Firefox again, I am not signed in (even thought I recieve the email about a new sign-in to mozilla) and have to try the process again, only to experience the freezing browser again. How can I solve this or troubleshoot? I have Win11, my broser is supposedly up-to-date. Thank you! Anna

What are your best tips for optimizing Firefox Desktop for daily use, especially in terms of speed, memory management, and handling multiple tabs without affecting overall system performance?

I had to uninstall Firefox. I briefly added then removed an extension called "atlas speed dial". Since then, I haven't been able to get a tab to open. I uninstalled and reinstalled Firefox. It recognized that Firefox was on my pc before when it reinstalled. I had some tabs open and organized. I tried to recover tabs. I tried just using a new window and opening new tabs. Finally I just uninstalled for good, unless someone can tell me how to fix this issue. I'm using two other browsers. Luckily, when I installed another browser I'm using, I decided to temporarily set the new one as my default. I've setup several shortcuts and organized my desktop since then. So all of the shortcuts work through the other browser. But, I'd really like to still be able to use Firefox and especially would like to restore my open tab organization.

When composing an email the cursor often disappears and has to be replaced in the correct position. It seems to only happen in Firefox. It usually happens after I hit the space bar or sometimes in the middle of a word.

I just tried Edge and the problem did not occur.

My email server is Yahoo.com.au

Have others reported this?

Why isn't there a setting to open closed tabs from the history menu in a new tab, rather than overwriting the current tab? This is incredibly frustrating as I just lost a lot of progress on a page that doesn't autosave when I tried to open a tab I had closed a day earlier with information I needed. Is there anyway to do this with config files or something?

I reinstalled a new win11 and downloded fresh firefox. Sync is not working and I have no previous data to resume working. All tabs and logins are not showing in new firefox. Pls fix the issue.

I'm getting announcements of a virus threat that purports to come from Mozilla Firefox. Usually one or all three of the attached small windows that say: 1. "Viruses Found. Antivirus notification. via https+++d512ucanaffc739fe48g.cgm-defender.pro" With a Dismiss button. 2. Attention! Click here to secure your data!. via https+++d512ucanaffc739fe48g.cgm-defender.pro" With a Dismiss button. 3. "System Warning!. Click here to remove them! via https+++d512ucanaffc739fe48g.cgm-defender.pro" With a Dismiss button. I have run full scans and offline scans with MS Defender, but these warnings still appear. Is this legit? I suspect these are a virus of some sort. Either way, how do I deal with this?

For the very first time, today I got the following, "Gah. Your tab just crashed." and it now happens every time. What's up? Is this a Mozilla problem? Should I be moving on to a new browser? Help!