Diễn đàn hỗ trợ Firefox

Ran into an interesting bug with Firefox since installing the macOS26 Dev beta. Whenever I use command space to bring up spotlight, Firefox become unresponsive, the beach ball will spin. It will only happen if Firefox is in focus when I use spotlight, and only if I am signed into Firefox sync.

I am not sure of a way to help replicate this issue as it seems to only happen when signed with Sync, but I would be happy to provide additional if I can.

Hi I have lost all my browsing history and nothing I browse is saved. Also all my bookmarks have disappeared and I can't save anything even clicking on the star doesn't do anything I have quite a bit of stuff bookmarked, can you help? The browsing history and my bookmarks seemed to disappear at the same time.

I do not and will not use the sidebar/vertical tabs features.

Unfortunately, it seems that firefox has decided to reactivate these features with an update? This is unacceptable. I do not want my settings to be altered with a software update. If firefox wants to tell me about a new feature, feel free to make a dialogue bubble pop up (once) asking if I'd like to explore said new features. Otherwise, please refrain from altering my preferred configuration without permission or notification. Doing so is completely asinine at best and shows open contempt for your customer base at worst.

I do not wish to give mozilla/firefox another opportunity to make my experience worse, thusly I ask: Is there anyway to entirely remove/disable the sidebar/vertical tabs feature from the browser so that it cannot be reactivated without the specific actions of the user?

I had to quit Firefox this morning because of a problem with my proxy and when it reopened it had updated to Firefox 139. In the process, I lost my entire browsing history and all open tabs from my previous session. Although in settings I have "Open previous windows and tabs" selected always, when Firefox restarted the browsing history was empty and "Restore previous session" was not an option under history, nor were "Recently closed tabs" or "Recently closed windows." I cannot locate any backup files in the Firefox library on my computer (MacBook Air running Ventura 13.7.5). I really need to be able to restore the previous session, please let me know if this is possible.

I am experiencing an issue with the Keeper browser extension on Mozilla Firefox. Despite configuring all related settings appropriately, the extension consistently locks out every time I close the browser.

To troubleshoot, I have:

Verified that the extension is enabled and fully allowed in Firefox’s Extension settings.

Ensured that Keeper is whitelisted in every possible relevant setting within the browser.

Checked that the "stay logged in" or persistent session options are correctly set within Keeper’s own configuration.

Confirmed that no conflicting privacy settings or third-party add-ons are interfering with the extension's functionality.

Despite these measures, the extension does not retain its logged-in state upon browser closure. This behavior suggests a persistent session issue not aligned with the user-side configuration.

I would appreciate guidance on how to resolve this.

Hi,

I’m using the latest version of Firefox on Windows 11 (currently v126.0), and I’ve noticed a recurring issue: the browser freezes for a few seconds when I switch between tabs, especially if one of the tabs contains a media-heavy website (like YouTube or online editors).

The browser doesn’t crash, but becomes unresponsive for 5–10 seconds before catching up. Task Manager shows a CPU spike during the freeze. I’ve tried the following:

-Clearing cache -Disabling all extensions -Running in Troubleshoot Mode -Updating graphics drivers

None of these solved the issue.

Is this a known problem? Any suggestions on how to fix or further debug it?

Thanks in advance!

Hello, I am trying to login to my account on www.zazzle.com and use their site. Sometimes it will let me through and I can be on the site for about 20 minutes before a captcha comes up that says press and hold this button so we know you are not a bot. Well the button never works, it always errs out and gives me the message to please try again, and then locks me out of their site. I have tried clearing my cache and cookies, updating my browser, resetting the router, I don't have any VPN's, I have tried working in a private window, adding the website to the privacy exceptions, block pop up windows is unchecked, I am out of ideas, what do I do??

I keep getting a small box that appears in the upper right corner of my yahoo email home screen that says it is from Firefox and asks if I want to upgrade to the latest version of firefox. If so click here and the upgrade will be installed and your open website connections will still be open once it has been accomplished.

I'm nervous about just believing anything that is presented or pitched to me on the internet.

Upon accessing the firefox website just now under upgrades it says that upgrades to firefox will be made automatically as appropriate, but if I want to manually install an upgrade there is a way to do it.

• • • Is the small box offering to upgrade my firefox browser actually from firefox? Or some scammer?

I'm thinking that if upgrades are done automatically, why would I get this box asking me if I want to install the latest upgrade?

The Firefox version I used before was Mac version 136.0 After I updated to the latest version, I found that the fonts of the browser's tab bar, search box, and bookmarks became significantly larger. How can I change the font size?

Hello: FF 140.b9 64b w11p. Are there ANY search engines (not nec browsers, just want to do a search in the address bar or search field) that do NOT go to an AI site to search? I want to minimize my use of AI technology, which uses extremely environmentally costly data farms. Thank you.

Apparently Firefox did an update (version 136.0.4) in the background while I was using Firefox on March 27. At some point I wanted to save a page to my bookmarks and realized all my bookmarks were missing. I had just used bookmarks earlier, so it had to have been an update. This happened to me before back in January 2025. I was without my bookmarks for several weeks when all of a sudden they showed up again.

I cannot use the instructions to go back to a previous profile, as the two options showing do not have my bookmarks, bookmark toolbar or customized Firefox homepage. I also cannot import my saved bookmarks to get them back. I get an error message when I attempt to do that option.

This is very frustrating, as I use my bookmarks, toolbar and customized homepage EVERY day. I have all my important links saved to bookmarks. Firefox developers need to find out why an update removes bookmarks, as this seems to be an ongoing issue with me. I've used Firefox for over 17+ years and never had bookmarks removed after an update before, so something in an update is causing this issue.

I have no idea at this point IF everything will return to normal in a few weeks like it did back in January. So right now I am without all my bookmarks. Please get this ongoing issue resolved, it's a royal pain. I need those bookmarks to maintain my daily routine for accessing financials, medical websites, etc.

Thanks for any help you can give me at this point. This is the second time it has happened.