Diễn đàn hỗ trợ Firefox

I am evaluating a password manager application and exported my FF passwords and imported them into the app. For testing I removed all of the passwords from FF. I want to password protect the csv file rather than delete it in case I need to import the passwords back into FF. When I go to File/Info, the "Protect Workbook" option is greyed out. When I go to the "Review" tab, the option to "Protect Workbook" is available, not the "Unprotect" option, so the workbook is not protected. If I click on the "Share" folder on the right side of the ribbon, there is no "More" option. In Windows Explorer the file is on my desktop, not OneDrive - Personal. I right clicked on the file, selected "Give access to" and took the option to remove access. The File/Info option is still greyed out. How can I password protect this file or how can I export it in a format that can be imported later?

I have just opened MS Teams on my Firefox 137.0 on my WIndows 11 and I get a blank screen. NOthing happens. I see that by looking in Edge the format of MS Teams layout has completely changed. I imagine that there's a setting to change to enable teams to work but how can I find it?

i was trying to access shopify and its protect behind a firewall and it was asking if firefox as access to the internet or its being protect by the firewall how would i go about using this website if i don't know how to go about this

in FF 137.02 Win11Pro there is no reopen previous session option in the history menu, even though in settings, history, "firefox will" is set to remember history. We tried reinstalling FF. No luck.

Is there a way to reopen the previous session?

Has that feature been deleted?

How do I remove "firefox browser being managed by your organisation" . I have looked at several posts and don't understand a word of it. I recently re-installed Firefox and lost all my passwords but still have bookmarks, every time I turn off firefox it forgets my account sign in, I then get an email to say I have signged in on a new device. I suspect it is the Norton 360 security software. Please can someone explain in simple terms how to remove it. I have tried contacting Norton but their support is worse than Microsoft.

I use Gmail, and when I receive a newsletter from the local government, Gmail does not display the images in the newsletter. I've set Gmail to display the images (photographs), so I'm guessing Firefox must have a setting that is blocking the display?

I was trying to go to ssa.gov, today, and hit the button to login. When I did that, I got a 400 page saying: Bad Request

Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit.

I have done this before, and it worked. To test if it was a problem with the web page or the browser, I did it from another browser (Brave), and it loaded fine. Is Firefox sending a bad request? Is this something you can fix.

I am using Mozilla Firefox for Linux Mint 137.0.1 (64 bit).

All my other browsers work fine but since April 4, 2025 Firefox won’t work at all. Websites won’t load. I have tried to clear my cache & cookies, I have checked my connection settings, I have checked for malware, I have turned off all my extensions and I have completely restarted my computer several times now, nothing has worked. I also did trouble shoot mode & reinstalled Firefox (though I will admit I maybe didn’t do this step properly). I refreshed Firefox. Why is it not working? What happened? I don’t know what to do as I don’t want to lose all my bookmarks and passwords that I have yet to move over to my password manager. Please help.

I restarted Firefox on my Mac earlier, which I think updated it from 136 to 137. After reopening it, web pages won’t load anymore. They either time out or just load indefinitely without doing anything. I went through the troubleshooting page and tried reinstalling it, which didn’t help. My computer’s firewall is off as well. I’ve tried refreshing it multiple times, and I get a message that Firefox has crashed before it actually refreshes. After that, pages will load normally for a very short amount of time (about 30 seconds) before stopping again. Pages are still loading normally on Chrome and Safari, so it’s only Firefox that’s having an issue. Does anyone have any solutions for what this could be/ways to fix it?

When I put my laptop to sleep, websites I am logged into are often logged out when I return. Note that I don't close Firefox. The tabs generally reopen but require login again. Windows 11, Firefox 137.0.1

For example, I put my laptop to sleep for lunch. When I returned, tabs were there, but I was logged out of gmail, Discord, and a website I was logged into.

This seems to happen more frequently recently, but not every time, as far as I know. But this is a relatively new problem, possibly related to a new laptop. Occasionally I get a message that there is trouble restoring my session.

Hi there,

I’m using the Firefox Multi-Account Containers extension and would like to remove a site that’s been set to "Always open in [X] container." However, I don’t see a “Manage Site List” option anywhere in the container settings as seen here: https://support.mozilla.org/en-US/kb/containers

Here’s what I’ve tried so far:

   I’ve clicked the Containers icon and selected the gear ⚙️ to edit a container.

   I enabled privacy.userContext.siteAssignments.enabled in about:config and set it to true.

   I restarted Firefox (with session restore on), but still no option appears to view or manage assigned sites.

I’m on Firefox Desktop (Mac), and I’ve confirmed that I’m using the official Multi-Account Containers extension.

Is this a bug, a UI change, or something I’m missing? I’d really prefer not to manually edit the containers.json file if there’s a built-in way to manage these assignments.

Thanks so much for any guidance!

When searching on the internet, after entering the search name and hitting enter. The search results are on a Yahoo search page. I can't find any malware, extension, add-on that is associated with Yahoo. I did see a log that was in red that was associated with a website I attempted to convert a png file to a ico file. However, after downloading the software it was for converting PDF's to images. so I uninstalled it. it was after that Yahoo showed up. That log in web history was associated with the software.

I just downloaded firefox for the first time because Chrome disabled uBlocker. I have added uBlocker and 1Password as extensions, but neither of them are working on any webpage at all. I also can't pin extentions. I have restarted firefox and my computer several times. What do I do?