I-Firefox Community Forum

With the last two updates that Mozilla Firefox for desktop sent, I get an error message that will not allow me to open or use Firefox. The error message is "Cannot load XPCOM." I've had to uninstall Firefox and download it again both times to make Firefox work until the next time you send an update, then I have to go through this procedure all over again. What is going wrong? Any help would be greatly appreciated. If this cannot be fixed I will need to find another browser (although it won't be as good as Firefox has been over the years.

David Roth [edited email from public]

Ever since a few weeks ago, some of my add-ons as well as every new add-on I added after that are unavailable at the start of Firefox. I then have to click into the application menu, click on the warning message for that add-on and enable it again. Since this is quite tedious and frustrating, I tried looking online for any info. I tried updating everything, disabling and enabling manually and removed and re-added some if the add-ons that cause issues.

I am loath to set up a fresh profile or reset all add-ons as that would cost a lot of time to configure everything again. In hopes of a solution that avoids that I am asking here now.

I am having an issue with an old firefox process in the background but I don't see one. I need to remove it before I can run the new install copy of firefox 64bit. Any suggestions to resolving my issue.

I am told that when FireFox closes it is supposed to delete a file called parent.lock in FireFox's Profile Folder. The parent.lock file does not delete when I close FireFox and consequentially it will not allow me to open a new instance of FireFox. If what I say is in fact true, what can I do to fix it? If what I say isn't the case, what can I do to make FireFox open a new instance of FireFox once I close it.

I sure hope I have explained this so it can be understood. When I close FF and then try to open it again, I get a dialog box saying FF is already open and has to close first. Not sure if those are the exact words but I was told that the parent.lock was to be deleted and that isn't happening. What can I do? Thanks.

Got a new laptop. Trying to download Swagbutton but when I click on add the button, the ucontent page opens but never loads. I've never had a problem before. Any ideas/suggestions? I also can't get Swagbucks as my default search engine.

I had an automatic install of your latest program for my computer and when I restarted it I had lost all my passwords and bookmarks. I would like to know how to get them back,

i was using firefox with multiple tabs for most of today, had to shut pc down to run errands. When i restarted pc, firefox would not start, i have it pinned on my task bar/start menu/whatever. I opened my system moniter to see what was going on when i tried to start firefox and the processes do not show up in the process list. I tried a reinstall with the ubuntu software store and no noticeable change in behavior. Not sure how to get into the profile section, the option for it with a right click on the firefox icon does nothing seemingly. Under normal operations i have seen two firefox processes listed.

I'm very much computer-ignorant. I'm getting messages on various sites that I need to update my current browser. Downloaded latest Firefox, but lost as to next step. I'm on LinuxMint.

So I've been beating my head against the wall on this one... first I couldn't load Firefox and the error message would say 'Firefox is active but not responding.' I looked into that, it suggested deleting the profiles.ini file... I did, and it didn't do anything. I then tried deleting the profile folder entirely. That changed the error at least. Now it says 'no profile.'

So, I tried following directions to create a new profile. Win+R, firefox.exe -p and then tried to create a new profile and... nothing. "An unexpected error has prevented your changes from being saved."

Unsure if its connected, but at the same time, several Steam games have been struggling to sync to the cloud, and Discord stopped working to the point I needed a clean install.

Already tried to do a clean install with Firefox and that didn't work either.

I made the mistake of letting the browser automatically update. Today when I turned on my computer Firefox opened a fresh page (deleting all the tabs I had open) asking me if I wanted to import saved passwords and browsing data. That was annoying enough on its own, but instead of importing from the old version, it imported everything from my other browser which I had kept separate and different for numerous reasons.

On top of that, when I try to load web pages of any sort, it just sits there loading and does nothing so the browser is entirely unusable to me right now. Please tell me that there is an easy fix and/or a way to get all my data back.

I'm trying to install ad blocks and it seems that the Firefox browser doesn't recognize itself as a Firefox browser. It's telling me to download Firefox when I'm using a Firefox browser in the first place

Last night, my computer crashed while running Firefox and now whenever I try to run it, I get an error message that says "Couldn't load XPCOM" and the browser closes itself.

I've tried reinstalling Firefox multiple times through the uninstaller and by manually removing the files in Program Files and appdata, but I still get this error. If it helps, I also get this error when installing a fresh Firefox installation.

I hope I can get this solved soon because I have a ton of deadlines coming up for school and I'm not able to clock into my remote job, either... Any help is appreciated

My extensions are not showing up in the firefox browser, on menu bar, tool bar, or bookmarks bar. I am elderly and NOT computer literate. What to do? Using Windows 10.

Thank you.