Diễn đàn hỗ trợ Firefox

duplicate of /questions/1558885 thread

I just bought a new computer. How do I sync firefox on my old computer with firefox on my new computer. The same for thunderbird mail. Please help. I am not a computer genius. Dave Muran [edited email and phone# from public community support forum)

On Windows 10 with 64-bit Firefox, after updating from version 144 to 145, some local HTTP-only servers stopped working and became inaccessible. When I enter http://<local server name>, after a few seconds it automatically changes to https://<local server name>, and since no HTTPS service is running, it ends with a “Server not found” page. It seems to be related to DNS — accessing http://<IP address> works fine.

I tried a clean installation with a new user profile, but it didn’t help. Downgrading to version 144 fixes the problem, but at the cost of losing the user profile (which is a disaster). I also tried to check the HTTP-only settings (which I’ve never modified), but that didn’t help either.

Is anyone else experiencing the same issue?

A recent update (https://windowsreport.com/firefox-fixes-an-8-year-old-windows-bug-that-broke-virtual-desktop-use/) has broken behavior I previously depended on as part of my workflows: If I clicked a link in one desktop, it would open that link in the browser instance on the last desktop I'd used, so I could keep all my browser windows on one virtual desktop full-screened for easy viewing, then slide back to my other workspaces for messaging/writing/etc.

Now, apparently as a bug fix, every time I try to open a link on a desktop, it creates a new Firefox instance in that desktop instead of opening the link in the browser I have open on other workspaces. This has dramatically impacted how I work. How can I restore the previous behavior? It is so disruptive having new windows opening all the time instead of keeping them in my dedicated browser workspace. If there isn't a fix for this, I will need to move to a new browser.

I started using the new "Profiles" feature in firefox, and I created profiles one one device. However I am finding that the profiles are not syncing across my devices. Both are Windows 11 VMs, I tried doing manual syncs, singed out and back in to both devices. But the Profiles I create on each just do not seem to sync, is this the expected behavior ?

I opened FF this afternoon and it op0end like a new first time install- asking about setting up some damn profiles and showing news, AI, weather and crap I do not want or use..

I can not seem to restore it. All bookmarks, PW, menu bars and links are now gone.

There was a issue with my computer due to which I had to reset the unit and once the reset was completed I'm unable to recover my data as its asking for 32 account recovery key, I'm unable to find that key anywhere and need help where can i find the key as there are important bookmarks which I need back.

Since Firefox automatically updated (14.0.1) on my MacBook Air (2025 model) several weeks ago, the Bookmarks and History functions haven't worked. Can anyone suggest how I can fix this?

a black box appears over the search box when mouse is moved over the tab. Tried in safe and troubleshoot mode. Box still appears only in white I did find an answer previously but reinstalled firefox and the fix was lost. Problem resolved.

Thanks all for looking.

I just wanted create Account recovery key to keep my account more secure. So I did that + updated my password.

Now when I open the browser, it says account disconnected and that I need to create a new profile. I did that, but it started syncing from old chrome account with old extensions, bookmarks etc. Plus bookmarks from my phone.

I try to sign in and create new profile with the original profile settings that I want. But it keeps saying "This profile was previously synced to a different account". And now that I saved the bookmarks and made a third, fourth profile. Those don't work as it wants me to sign in. Only the 2nd profile that Firefox made me create which has the old extensions, bookmarks etc. It is missing a lot. So now I am just stuck in create profile loop. And cant use the one I want because I wanted more security? Do I need to uninstall and install again, would that help? I wish there was someone to talk to help me. I just want to use my original profile that I used earlier today to update the security settings.

Amazon - keeps loading and loading without ever finishing, only displaying half the page. YouTube Videos need to preload to avoid buffering. Certain websites can not be reached at all, failing with error message "Looks like your network is blocking this page" or similar. Etsy is not loading at all, just a blank page.

All these pages work fine in other browsers, so I don't think it's my network. I was not able to identify a specific error across all pages via Console. I have tried a few recommended troubleshooting tips, but no change so far. This has been going on for a while, long enough for me to reinstall Firefox - also no change. I'm on version 146.0.1

What is going on?

I can't find a place to manage my payment methods. The only place I found that was when I check out and fill in my information in a store website.

The browser suggests my card and under that it says "Manage payment methods".

When I click that it opens "about:preferences#privacy-form-autofill" and then quickly becomes "about:preferences#privacy".

Please help thanks

I typically use FF to log into social security accounts. I have not been able to use FF for a couple of months to log in to ONLY THAT SITE. I can on CHROME.

ERROR MESSAGE: Bad Request

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

I uncheckd the checked box labled "check spelling as you type" to disable it and it's still showing spellcheck. It's gettingin the way of me typing and being able to spell on my own. It's extremely annoying that I can turn off a featire and the progra will just ingore that I've turened it off. Why is this an actualy problem? why doesn't this button just work? I want it OFF... Please.

For many years, I've used a utility called DropZone in my menubar, which (among other things) allows documents to be automatically sorted into user-created locations (e.g., folders in the Finder).

Last night, suddenly, each time I drag a photo from Firefox to DropZone, a large window called "Action Console" opens, displaying a bunch of text. Here's a typical message that's displayed:

[Launching task with command line: runner.rb task-26498]

Task description file task-26498:

ACTION: "/Applications/- Misc. apps/Dropzone 4.app/Contents/Actions/Move Files.dzbundle" EVENT: "dragged" VARIABLE: "support_folder" "/Users/mervynwarren/Library/Application Support/Dropzone" VARIABLE: "dragged_type" "files" VARIABLE: "app_version" "4.80.66" VARIABLE: "apple_silicon" "1" VARIABLE: "os_version" "26.0.0" VARIABLE: "path" "/Users/mervynwarren/Pictures/iTunes art" VARIABLE: "tmp_folder" "/var/folders/7l/ldzhrwyx1v1dy2tky3c1_y640000gn/T/"

Determinate: 1 Begin_Message: Moving files... /Applications/- Misc. apps/Dropzone 4.app/Contents/Actions/lib/filecopy.rb:13:in `do_copy': undefined method `each' for nil:NilClass (NoMethodError) from /Applications/- Misc. apps/Dropzone 4.app/Contents/Actions/Move Files.dzbundle/action.rb:27:in `dragged' from /Applications/- Misc. apps/Dropzone 4.app/Contents/Actions/lib/runner.rb:77:in `call' from /Applications/- Misc. apps/Dropzone 4.app/Contents/Actions/lib/runner.rb:77:in `<main>'

[Task completed]

Ironically, although the last line says "Task completed," the task I was attempting to perform (moving a photo into a given folder) is in fact NOT comleted at all.

Further observations:

This behavior is not displayed in Safari. In Safari, images continue to be moved to the desired folder, as intended.

I googled "action console keeps opening in Firefox," and I performed 4 troubleshooting steps that google AI suggested (including launching Firefox into troubleshooting mode). Unfortunately, in troubleshooting mode, the behavior persists, which suggests that this has nothing to do with any add-ons.

I also created a new, test profile—but even in the test profile, the behavior persists.

So, I'm stumped. After years of using Firefox, this behavior has appeared out of nowhere—and I cannot figure out why, nor how to fix it.

Any further suggestions?

Good morning One and All Why is the 'customise' facility, bottom right of tab, not available if the tab is blank? I have downloaded a personal photograph as my background but it is ruined by the Google search bar and the Firefox logo above it. Why can't these 2 items be moved either to the side, below or above?