Firefox Community Forum

I have had access to TastyTrade thru FireFox for years. Within the last two days I am unable to log on. When I click on the link the screen goes all white and the page will not open. When using Edge I am able to get logged in but not thru FireFox which is my preferred browser.

I have credit card auto-filling enabled and several credit cards active. However, most of the time, when I go to use the autofill, though the card choices appear and I am able to select one, and it usually temporarily shows the fields to be filled, when the menu closes, the auto-fills are gone! It's worse than not having autofill at all. This seems to happen the majority of sites where I try to use it.

When there is a field to fill in my credit card info, the info will appear and let me select the CC I want to use but when I move away from the field the CC info goes away.

‘Storage: I'm using 105 GB of 245 GB available in my Mac Tahoe 26.5... but Google says I'm out of storage. How do I get to use the unused storage so I don't have to buy what I don't need? Thanks.’ for ‘Firefox for iOS’

Issues with redirect. A group I am a member of uses Constant Contact. An email is sent with a link to a report. Receive this error:

Server Not Found

Firefox can’t connect to the server at deuaxb4ab.cc.rs6.net. What can you do about it?

This worked last week.

Firefox 152.0.4. Win10

I've been using the extension "Tree Style Tab" and "TST Colored Tabs." I've been looking for a way to disable the native Firefox tab bar, whether on top of the window or to the left side. I haven't been successful on my own.

After a couple of hours troubleshooting this with CoPilot, It suggested I post the following short summary:

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Firefox 152.0.6 (64-bit) about:profiles shows active profile: C:\Users\dmerc\AppData\Roaming\Mozilla\Firefox\Profiles\usm8kxcr.default-release

Opening that directory from about:support shows an empty folder.

profiles.ini references: agwp164m.default-release

userChrome.css loads correctly in a separate profile but not in the profile containing my current extensions and history.

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The details of how it came to this conclusion:

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Based on everything you've found:

The profile with your current extensions and recent history is reported as: usm8kxcr.default-release

Opening that profile folder shows an empty directory. The only other real profile on disk is: agwp164m.default-release

We successfully proved userChrome.css loads in a different test profile (Profile 1) because the toolbar turned red. Therefore, the CSS mechanism itself works on your machine.

My conclusion is that your Firefox profile registration has become inconsistent. Firefox appears to be using a profile that does not correspond cleanly to the profile folders you're seeing in Explorer. At this point I would:

Back up the entire folder: (NOTE: DONE - backed to to another drive) C:\Users\dmerc\AppData\Roaming\Mozilla\Firefox

Keep using the profile that contains your extensions and recent history. Avoid deleting any profiles or profile folders.

Post the details you've collected to either: the Mozilla Support forum, or r/firefox

The key facts to provide are: Firefox 152.0.6 (64-bit)about:profiles shows active profile: C:\Users\dmerc\AppData\Roaming\Mozilla\Firefox\Profiles\usm8kxcr.default-release.

Opening that directory from about:support shows an empty folder.

profiles.ini references: agwp164m.default-release

userChrome.css loads correctly in a separate profile but not in the profile containing my current extensions and history. \ Those facts point to a profile-management issue rather than a Tree Style Tab or CSS issue.

The good news is that your current extensions and recent history are still accessible, so this doesn't look like data loss. The profile mapping itself needs to be untangled before custom CSS can reliably be applied.

=

It also suggested not copying any folders and files between profiles for now.

I'm trying to find a solution for having all tabs open across devices. Currently, my desktop has about 50 open tabs that I access regularly. Today, I installed Firefox on my laptop, signed in and initiated syncing. All bookmarks came over, everything looks great, except that none of my open tabs from the desktop browser show on my laptop.

I would like to have identical tabs open across devices. Is there a way to configure this where a new computer being logged in automatically receives all open tabs from the initial device and then tabs automatically sync based on whatever is opened/closed on either device after the initial tabs are identically synced?

I rely on Firefox entirely for my business. I'm really concerned that Firefox is become choked up - it is really slow to load pages. Am desperate to get it cleaned up ('serviced' so to speak) but am finding it difficult to get simple instructions to do this myself. Where can I get expert help?

When I use my bank's desktop website, I can use all services on the site except when I request a Proof of Payment. I can do it using Edge. How to fix in Firefox?

I have also entered the bank's websites (http version and https version) on the allowed websites section in Firefox settings. What else must I turn on or off?

V R Sebastian [redacted phone# from community support forum]

Subject: Firefox Sync appears to have erased all bookmarks after setting up a new Windows installation

Hello Mozilla Support,

I believe I have encountered a Firefox Sync issue that resulted in the loss of my entire bookmarks collection.

Here is exactly what happened:

I have been using Firefox Sync for several years without any issues. This was not my first Windows reinstallation. I have restored Firefox through Sync multiple times before. Firefox Sync had always synchronized bookmarks, passwords, history, extensions and open tabs correctly across my Windows PC and Android phone. I had approximately 350 bookmarks, organized into folders. Timeline Yesterday I performed a clean installation of Windows 11. I installed Firefox 152.0.5 (64-bit). I signed into my existing Firefox Account. I did not immediately enable Sync, so nothing was synchronized at that point. Today I enabled Sync and waited for the synchronization to complete. Passwords synchronized successfully. Browsing history synchronized successfully (it took a little longer). Extensions were restored successfully. Bookmarks never appeared.

Immediately after noticing this, I checked Firefox on my Android phone.

At first, one of the bookmark folders still showed that it contained more than 300 items (I saw the item count), but when I opened the folder it was completely empty. After synchronization finished, all bookmarks disappeared from both devices.

Additional information Browsing history is still present. Saved passwords are still present. Extensions are still present. Open tabs synchronization continues to work. Bookmark synchronization is enabled. I am signed into the correct Firefox Account. The second local Firefox profile is empty. The automatic bookmark backup now contains only the current state (7 items), indicating that the original backup has already been overwritten. The current profile contains both places.sqlite and places.sqlite-wal. The only Sync error log is related to a temporary DNS lookup failure (NS_ERROR_UNKNOWN_HOST) and contains no bookmark synchronization errors.

Because history, passwords and extensions synchronized correctly, this does not appear to be an account or authentication problem.

What concerns me most is that I briefly saw the bookmark folder still reporting over 300 items on Android before it became empty. This makes me suspect that something went wrong during bookmark synchronization rather than the bookmarks simply never existing on the server.

Could you please advise:

Is there any server-side recovery or investigation that can be performed for Firefox Sync bookmark data? Are there any diagnostic logs that I can provide? Is this a known issue with Firefox Sync after connecting a newly installed device?

I would greatly appreciate any assistance, as this bookmark collection had been accumulated over many years.

I have a Sync error log available: error-sync-1783454370913.txt

It only contains a DNS error related to tabs synchronization: NS_ERROR_UNKNOWN_HOST

There are no bookmark-related errors in the log.

Thank you.

Firefox updated and all of my tabs I had open are gone. I used those for organizing and remembering things. There's no option to open recently closed windows. No history of the tabs as a group. What do I do?

I attended a conference and can't open any of there links due to the fact it is on the cloudfare program???? website is https://s3.us-east-1.amazonaws.com/RETA/2026/files/index-table-2026-mid-year-update-.xlsx and the message

this is what I get back each time and I have never had this happen before:

Server Not Found

Firefox can’t connect to the server at s3.us-east-1.amazonaws.com. What can you do about it?

Try connecting on a different device. Check your modem or router. Disconnect and reconnect to Wi-Fi.

I utilize a website called Twinspires for wagering on horses. It has a video popup (no sidebar tabs) that one can engage to watch the race outside of the Firefox browser. I quite like this feature. That said, I keep quite sidebar tabs saved as I use that feature to pin and then revisit websites that I want to spend more time on. Problem: If the browser closes on its own or other issue, it doesn't close the video popup. So when I restart the browser it "thinks" that video popup, with no saved sidebar tabs, was the last browser open so I lose all my saved sidebar tabs. If everything Firefox would close when the browser does, one could restore all tabs under history like one would normally do. Is there a setting so everything Firefox that is open closes when the browser does? Thank you.

Hello I just filled out a pdf and the font or writing came out blue I want it in black is there some where in Firefox i can get it in black w font or writing please Advise thank you

I’m using the latest stable Firefox package from the official Mozilla repository for Ubuntu, on a system with 32GB of RAM.

I’m also using Microsoft Teams for work calls, in the browser (because Linux) and I notice that Ubuntu has killed the FF process twice last week because it was using too much memory - see attached image. I’ve only had 4 or 5 Teams calls last week so this isn’t a great success rate. It seems that after half an hour or so, FF has hogged so much memory that the OS feels the need to kill it.

If this is a known issue: are there any known workarounds?

If this is not a known issue :Can I help by providing troubleshooting data? How?

Thanks in advance!