Firefox Support Forum

I found that Firefox can automatically generate a QR code for each URL, which is a powerful and useful feature! I'd like to know if this QR code has an expiration date.

My computer crashed and I have to reinstall everything now. I was using Firefox 78 with Mac OS 10.11.6 el capitan. Please provide link to where I can download this version.

I broke an old computer and have my logins from it on a backup drive in logins.json and key4.db. I can't work out how to transfer these logins to my new computer. I've tried creating a new firefox profile since I am nervous of losing logins that are on my new computer, but then I am totally lost.

I cannot access certain email documents because my pop up is blocked. I have tried a number of searches as to where to disable the pop up for firefox but keep hitting dead ends.

I wanted to move my FF profile from my old PC (Firefox ESR for Windows XP SP3 32 bit 52.9?) to my new PC where I installed Firefox ESR 91.11 64 bit.

Moving the profile was no problem. I simply copied it on an USB-Stick and moved it to the profile folder of the new installation.

Starting FF works and it remembers all old links, settings and usernames for the sites I visited - BUT it does not store any password I enter after having moved the profile.

I received a message from Fire Fox that I should update. Now I have 2 Fire Fox icons and I need to know how to determine which one to delete. Then I need to know how to transfer my favorites and history to the one I keep. They both show favorites and history. I'm a rookie at this so if you can explain step by step it would help, thanks.

I did a full reinstall of my Firefox browser because of a problem where it couldn't load some youtube diy videos (that did load in another browser). Before the reinstall I made bookmark and saved logins backups. No problems with backup/restore of bookmarks.

Exporting saved logins works perfectly and I get a readable csv file , but importing simply doesn't work. First of all the import feature was disabled by default (?). After making the change in the settings and restarting Firefox I see the 'import from file' option in the password manager.Big dissapointment however when you click the 'import from file' option and select the exported csv file because nothing happens ! No error, no result,nothing ! I tried several csv files from earlier backups but none work. Google on the other hand can import all of my csv's without any problem ! Any help on that would be greatly appreciated.

How does one migrate Firefox bookmarks and passwords from an old computer to a new computer?

There are four computers involved in this shuffle. Two new, one being retired, and one being repurposed. The only thing we haven't been able to figure out, is how to migrate Firefox's information from one computer to another one.

And, we've been working on this since Christmas. Edge, Brave, and Chrome took minutes. Combined.

But, transferring the information on Firefox has been impossible. Yes, I've read the help topics. No, they were not helpful. Firefox will not accept either the backup or export files from the old Firefox across multiple computers.

Yes, I have Sync. And, no, that hasn't worked either.

So, what is the next step?

I just downloaded Video DownloadHelper as an add-on to my Mozilla Firefox browser. After I finished installing it, I could not find any shortcut of any icon for me to click and use it. My purpose was to download some video clips to my desktop. I did try to click the 3-bars on the upper right corner of the menu bar to add the icon to the menu bar, but the icon was missing and I could not find it anywhere. I also checked to make sure that I have the latest version of FireFox. I did try to remove and delete Video DownloadHelper from FireFox, clear and remove all my data, cookies, history... and then defrag my hard drive, restart my desktop computer and then reinstall Video DownloadHelper. The Video DownloadHelper icon was nowhere to be found. My operating system I am using is Windows 11. There is no email, no phone number for me to contact. I hope a solution is found soon to fix and resolve that problem. Thank you very much.

I am lost. The articles in Mozilla Support explaining how to backup and migrate my current account , after reading them, just gave me a headache. Can someone explain (in plain english) please, how I can save my passwords, bookmarks and cookies that Firefox has associated with my 8 year old Win 10 Pro desktop so I can transfer that data to a new Win 11 Pro desktop. Any and all suggestions will greatly be appreciated. Firefox and I have been running together since 2004! Thank you, The Old Guy

I suffered a catastrophic crash and had to replace my computer, a mac. I replaced it with another mac.

Because the older one will not boot up, I could not migrate my firefox data.

I ended up doing 'lost password' for all my sites.

There are a couple where the lost password thing hasn't worked.

It occurred to me to rename the (new computer's) logins.json file, copy the old computer's logins.json file from my external backup drive, put it in new computer's /user/library/application support/firefox, and then look in preferences, get the two passwords I want, set things back, enter these passwords into firefox again.

This did not work. In fact, now no matter which file is named logins.json, preferences says I have NO passwords stored.

I cannot find anything that tells me how to just decrypt the .json files (at least, not in a step-by-step way that I can use.)

Hi, I need to install a digital certificate. The instructions I have are... Tools>options>advanced>encryption>view certificates>import but I can't find anything past "tools" Thanks, Katrina

Since about two months ago, I haven't been able to update Firefox(or any other browser for that matter). I've tried the typical method of going to Preferences, checking for updates, but I can't get passed that point. I get this error message stating "Failed to check for updates."

Chrome was giving me much of the same issue, I've allowed GoogleUpdate on my firewall rules, restarted the PC and tried again. Still got the same error message. I have no other antivirus software installed on this device other than the Windows Defender default app. Firefox hasn't told what I should be allowing past my firewall so I haven't tried anything similar for Firefox.

I also tried uninstalling Firefox, but when I tried to reinstall, I couldn't finish that process because clicking on Download Now led me to this error message stating "Hmm. We’re having trouble finding that site.

We can’t connect to the server at download.mozilla.org."

I assumed this was maybe a DNS issue. I tried a DNS flush but that also was ineffective. I tried changing my DNS servers to 1.1.1.1 and 1.1.1.2, also tried other known DNS servers but that didn't work either.

In the meantime, I'd like to at least get an offline installer going because my current version is 110.0.1.

Thank you.

I have Dlink web cams. They are only accessable via a MyDlink app. The app is only compatible with Firefox 51 or 52. How do i get older versions running on my laptop?