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In the last few weeks Firefox will not open even when using admin rights. NOTE: I have followed all available posts including multiple uninstalls (complete), deleting Firefox folders, reinstalling, etc. There have been no major (or known) changes to my Windows 10 Pro system. I run Heimdal Thor and Kaspersky antivirus protection and there have been no conflicts running both at any time. I also use Acronis Protection (I know it may seem like overkill but it works). I have turned off each of the above and Firefox still does not open. Firefox runs with no problems on my personal and work laptops. I am CompTia A+ Certified so somewhat knowledgeable (a little knowledge is a dangerous thing!) and have run sfc /scannow with no issues noted. Plus, two Heimdal support reps have logged onto my system, attempted to find a solution, found no issues with my system (Omen 880 even though I don't game). My wife is a dedicated Firefox user and wants it back.

Firefox 101.0.1 + extensions, Windows 11 22H2; both fully updated

Firefox has stopped saving the position of its window, looking to me like it is leaving space for my Windows taskbar but which is hidden.

Some online searching and I found that setting privacy.resistFingerprinting to false resolves the issue, but it is not a change I feel comfortable with and wonder if there is another solution. I have uBlock Origin installed so maybe I shouldn't be concerned.

Lighter fonts (from multiple families, and on multiple websites) are rendered so poorly they are barely legible.

I already tried disabled performance settings, and turning off ClearType in Windows (it barely had any effect)

How do we fix this?

When I try and open some articles on the BBC new wesite I get the attached message. How can that be resolved please? VPN is off. Error: 410 Gone Your client has made a request for a BBC domain that is no longer hosted on Akamai, but the request was sent to an Akamai IP address. This suggests your client is using a very out-of-date DNS response, or one that has been altered. If you're using VPN software or similar, try disabling it and / or contact your VPN provider's technical support.

Requested URL: https://www.bbc.co.uk/news/world-asia-61820604 Ghost IP: 104.124.180.165 Slot: 3891 NPN / ALPN protocol: h2 Client IP: 130.43.170.125 Timestamp: 1655367219 Internal ticket reference: PRB-1597.

I am trying to download a spreadsheet file which has a .xlsx extension. Firefox insists on downloading the file (my default action) but I want to be given the option to open in my spreadsheet program (Libreoffice).

Looking in Settings and scrolling down to Files and Applications -> Applications, there are other spreadsheet formats present but not one for .xlsx. How do I add the "Always Ask" option for .xlsx files?

Libreoffice is the default system application for opening these files.

I first thought this issue was contained to a single website and was the fault of their IT, but I have begun to experience this issue on other websites, and it does not occur on other devices also using Firefox. It is difficult to explain given that I don't have any idea what is actually happening, but hopefully I can make it clear enough.

For some websites that require a username and password, I will correctly login and pass authentication but then I will be booted back to the initial login screen, almost like the login failed. I only know that it is technically a log out, not a failure, because I have briefly seen the URL change like I'm logging out. I have tried uninstalling and reinstalling Firefox fresh multiple times on my Windows 11 laptop, but the same issue occurs consistently.

This happened when I was trying to login to the student portal for my university and when I was trying to login to my apartment's resident portal. Changing cookie settings or going into a private browser has not helped at all. I cannot tell if this is a bug with Firefox (maybe just on Windows 11?) or if there is some background setting that needs to be adjusted, but it is very frustrating. If this keeps happening, I would have to switch to a different browser, which would not be ideal.

Does anyone have any idea of steps that I could take for troubleshooting or any experience with similar issues? Any help would be greatly appreciated.

Hello Please explain to me how to transfer tabs from desktop to Android phone because there is no option on my desktop browser settings and no matter how much I sync, the desktop tabs will not be transferred to the phone again. please guide me

When I look up the error message I get, everyone I see who got it can't open Firefox, but I can open it fine. For me, I have Firefox as my default browser and when another program (tModLoader on Steam) tries to open it, it gives me "Profile Missing," "Your Firefox profile cannot be loaded. It may be missing or inaccessible." I don't know if it gives the same error for other programs because I can't think of any programs that open my default browser. When I switch my default browser to Edge, the program can open Edge fine.

My old 2009 MacBook Pro broke, got fixed, and now the backup won't transfer. So I need a new Firefox.

OS X El Capitan V10.11.6 is the latest this old computer will handle. On the mozilla.org download page, the app on the .dmg that gets downloaded says it wants OS X 10.12 or later.

I'd appreciate your suggestions.

--Gil

Comments below youtube videos won't load. This happens across all browsers on this computer regardless of add-ons or being logged into youtube.

I've attached a screenshot that shows that 176 comments are below that video but none load. I'm using the latest Firefox version on Windows 7.

If you need any extra information I will gladly provide it.

My bookmarks toolbar is empty. When looking through the bookmarks menu, it shows that none of my bookmarks have been removed, and they are all still listed as being present in the Bookmarks toolbar, but they are not displayed in such. To be clear, bookmarks toolbar is enabled, and I have already verified its positioning in the customize toolbar pane. There is a strip of empty space where they used to be, but they are simply missing now. How do I fix whatever issue caused the toolbar to cease displaying my bookmarks?

In the bookmark-bar in my Firefox-installation contains the soft-button for the function "Import bookmarks". I do not need this function always showed in the bookmark-bar. How can i remove it ?

Firefox says I need a video codec to play a video (that is aparently somewhere on the page). It does NOT tell me what video, what video format, or what codec I need. How do I find out what codec I need?

Firefox version: 101.0 (64 bit) OS: Fedora 36

I am using Firefox Version 101.0.1 (64-bit) for Desktop Windows 10 64bit (newest version (see question date for lookup info)).

This problem I could not find anywhere in this Firefox self support community. I think I discovered a bug in the firefox settings, but it might just be me missing something, but I doubt it, being familiar with the settings and them being clearly worded.

I can not seem to get my firefox to save the website always allowed to keep cookies stored between sessions (and their cookies / other data obviously also don't get saved between sessions). - maybe there arises a problem with the setting of never saving history between sessions?

Please, have a look at my current settings below (two screenshots): <image 1 (longer one)> <image 2 (shorter one, custom history settings)>

The settings being written as they are should mean that the always allowed websites should never have their cookies deleted between sessions, regardless of their history (their being visited) being deleted. To me this is frustrating and appears like a bug and not a feature.

Maybe is history is deleted all site permissions and data get deleted, too? - (If yes, that is clearly not what the settings suggest, and if it is supposed to work like this, I strongly suggest the Firefox Dev.s team to fix the confusion or add some feature work-around to suit my use-case. The internet is not a safe place anymore, generally, but some parts are, let me trust your settings do what the say they do, at the very least. Thanks in advance.)

Have just been given the security warning for a site www.solar-thailand. On using the advanced button I am told that " Firefox does not trust this site because it uses a certificate that is not valid for www.solar-thailand.com." and that the certificate is only valid for (list of sites): "The certificate is only valid for the following names: sim456.com, www.sim456.com, dodeetoday.com, home-dd.com, solar-thailand.com, service-thailand.com, dcspump.com, cable-thailand.com, led-thailand.com, tp-scg.com, 3d-thailand.com". Am I going mad or does the site actually exist in the list??? If someone could please explain this I would be very grateful. Thanks in advance, Peter.

Whenever I attempt to access DRM content such as netflix or spotify I am notified that the WidevineCdm plugin has crashed. I'm running firefox version 101.0.1 on Kubuntu 22.04, I am running the debian package release, but I had this issue with the snap version too. I've submitted crash reports, but they're all "EMPTY: no crashing thread" (https://crash-stats.mozilla.org/report/index/20af09a5-6bc4-4719-9242-38f5c0220614 here's one).