Diễn đàn hỗ trợ Firefox

Mozillers,

I depend heavily in my environmental and other work on Firefox and am grateful for its ability to restore previous tabs when my laptop, not infrequently, stops working abruptly.

Now the much-used bookmarks have disappeared. A search site states promisingly:

"To restore Firefox bookmarks, use the built-in backup feature by going to Menu > Bookmarks > Manage Bookmarks > Import & Backup > Restore, then select a dated backup or a manual file (like a JSON backup) to bring back lost bookmarks..."

But my Firefox's Bookmarks drop-down menu has no Manage Bookmarks option. PLEASE, what must I do?

Elsewhere I managed to find this file which apparently contains recent bookmarks:

"C:\Users\User\AppData\Roaming\Mozilla\Firefox\Profiles\unk14jlv.default-release-1647366062305\bookmarkbackups\bookmarks-2025-12-26_95_4IdGtYxezJpwuH1UIiT1bRwe1K6bcGO8rv0mqa9rUWU=.jsonlz4"

But attempting to open it with Applications\firefox.exe (default) accomplishes nothing.

FOOL-proof instructions would be wonderful. Thank you.

Firefox suddenly reset to a fresh install state: only default bookmarks, my custom ones are gone. No sync enabled. No manual reset/refresh/reinstall done. Tried: Restore from backups (none recent), about:profiles (only new profile), checked bookmarkbackups folder (empty/old). Please help recover bookmarks if possible. What could cause this? Any recovery steps?

Why have all my bookmarks disappeared? I wnt through several of th steps offered on the cautionary link and nothing changed. What Windows update defiled your security? Will I have to search for another browser? I've used Firefox for years ... don't make me search for a better browser.

On my Windows 11 IOT Enterprise LTSC system firefox does not entirely close. After I installed my professional tax software from Drake Software LLC the following happens repeatedly: I open Firefox, look at a page, close Firefox, the screen clears and when I try to REOPEN firefox a popup says that it is still running and offers close or cancel. Neither button opens,closes or cancels Firefox. I have to reboot to make Firefox (147.02 64bit) close. This happens every time I open Firefox.

I picked "performance and connectivity" because I am NOT connecting with you due to your constant Leftist biased performance.

I just thought you might like to know that because you keep posting biased fake Leftist news from CNN, AP, PBS, NPR, Axios, The Guardian, Washington Post, NY Times, etc., on my Firefox home page, I have BLOCKED all your content. I kept dismissing the CNN, etc. content but you kept right on sending it back.

- Richard W. Perkins

Firefox is blocking access to my yahoo mail trash and spam folders. The message says SSL_ERROR_RECORD_TOO_LONG. It refers to cow.hunt.forenenst.com as the problem. It says to contact the website. Does that mean cow.hunt... or should I contact Yahoo? Can Mozilla/Firefox help me? Should I try using Safari to access my Yahoo mail account? Should I contact Apple Support? Do I need to install some antimalware?

I have been using 1Password 7 to manage my login credentials. It includes a Firefox extension to fill in account names and passwords in login alerts and pages.

Firefox 147.0.1 (macOS aarch64) in January 2026 has broken 1Password 7's ability to fill in account names and passwords.

To reproduce: 1. Install 1Password 7 Version 7.9.11 (70911000) and its extension version 4.7.5.90 in Firefox 147.0.1 on macOS. 2. Visit a URL for which 1Password 7 has login credentials. 3. Click on the toolbar icon for 1Password 7. A 1Password 7 dialogue box pops down from the icon, containing the username and password for that URL. 4. Click the Autofill button in that dialogue box.

Observed behaviour: 1. Username and Password fields remain blank.

Expected behaviour: 1. Username and Password from 1Password 7 appear in the Username and Password fields.

For approximately the last three months, there was a partial failure similar to this. 1. 1Password 7 popdown dialogue moves from the toolbar icon to the Firefox tab for that URL. 2. Username and Password fields remain blank. 3. Workaround: click in the username field, then tab 2-4 times to further UI objects in the login credentials form. Then click the 1Password toolbar icon, then click the Autofill button in the popdown dialogue. Then, the Username and Password from 1Password 7 appear in the Username and Password fields.

The expected behaviour occurs for the same URLs in Safari.

Thus I suspect that Firefox has somehow changed its behaviour in the last few months to cause this regression. I have not changed the 1Password software versions in this time, because I am intentionally using a previous version of 1Password.

I am looking for a fix or workaround which works with my current 1Password software version. I am not interested in a solution which requires me to upgrade to the current version of 1Password. (The current version of 1Password imposes a feature which I am resisting.) I realise that this reduces the chance that I can persuade the Firefox team to find and correct this regression.

I got a message on my Win10 PC saying, "Your Firefox profile can not be loaded. It may be missing or inaccessible."

Mozilla help suggests looking in %APPDATA%\Mozilla\Firefox\Profiles\. I did this but don't know what to do next.

I have another Win10 PC where Mozilla still works, and they do sync. Should I copy some of the Mozilla folders from it to the first PC to restore the problem? Which ones?

BTW, I can still run the Mozilla TOR Browser on the first PC. Thank you!

When my computer reseted, I lost all my accounts. When I logged in with Mozilla, only past data from microsoft edge were restored because of the uploading part of the sign in. How do I get my bookmarks and passwords back?

Per [https://support.mozilla.org/en-US/kb/control-personal-device-local-networ...] I was looking for Settings > Permissions > "Local network devices" but the option was not present.

Looking at about:config network.lna.blocking I found it set to "false" by default. Only after I changed this to "true" did the UI shows the "Local network devices" configuration option.

Why is this disabled by default? Isn't this a security risk? It seems like users should be notified by default and have the option to block these requests.

After a few days of having no internet connection, my account was disconnected from my PC and saved passwords disappeared. After signing in to my account again and syncing, lost passwords were not recovered. I need help to recover them.

Hello,

I just installed a new version of Linux Mint (Zara) and all is right with Firefox, except the screenshot who doesn't work. The buttons "Capture the visible area" and "Capture the entire page" don't work. The additional tool in the toolbar doesn't work. What can i do, please? Thanks for your answer. Pierre

It's becoming very annoying when I open up my Firefox browser only to open a page and there's BING sitting in the upper left part of the screen. I got away from EDGE because of its invading characteristics. I have checked to make sure my default browser is Firefox. And it is. So how do I get rid of them?

Appreciate any comments.

Thanks. Scott

Hi,

I have logged out from some device (laptop) today. I had approx 150 tabs over there I would really like to recover. Is there any chance to get them back?

Kind regards Grzegorz

My old laptop computer completely died. I installed Firefox on my new computer. However, after signing back into Firefox, my stored passwords and tabs were not available. How do I find/recover saved login passwords and tabs? I am a long-time Firefox user and had a lot of stored information that I assumed would follow my account.

Thank You,

Dave Barber dd.barber@gmail.com