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Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release. 143.0.1 Firefox Release
September 19, 2025 Version 143.0.1, first offered to Release channel users on September 19, 2025 Fixed
Fixed a tab crash experienced by some users caused by DLL injection. (Bug 1872261)
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Firefox is no longer supported on Windows 8.1 and below.
Please download Firefox ESR (Extended Support Release) to use Firefox.
Download Firefox ESR 64-bit
Download Firefox ESR 32-bit Download a different build
Firefox is no longer supported on macOS 10.14 and below.
Please download Firefox ESR (Extended Support Release) to use Firefox. Download Firefox ESR
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I had to do a new install of Windows 11 and logged back into Firefox and can't find my old bookmarks. I got to this point and don't know how to retrieve old bookmarks: … (read more)
I had to do a new install of Windows 11 and logged back into Firefox and can't find my old bookmarks. I got to this point and don't know how to retrieve old bookmarks:
C:\Windows.old\Users\meljo\AppData\Roaming\Mozilla\Firefox\Profiles Please help me.
Thanks Mel
Firefox 126.0.1 displays a very long name of a container completely in the URL bar. Firefox 127.0 truncates container names AWS long account and role names make keeping… (read more)
Firefox 126.0.1 displays a very long name of a container completely in the URL bar.
Firefox 127.0 truncates container names
AWS long account and role names make keeping the long name very convenient (works with the 'AWS SSO Containers' Add-On
Firefox 139.0.1 (64-bit) on Windows 11 I occasionally increase the zoom level of websites (usually forums) with Ctrl+mouse wheel if the default text size is too small. H… (read more)
Firefox 139.0.1 (64-bit) on Windows 11
I occasionally increase the zoom level of websites (usually forums) with Ctrl+mouse wheel if the default text size is too small. However, if I forget to set them back to 100% (Ctrl+0) before closing the tab, the next time I open that URL, it's at the former adjusted zoom level -- not 100%. Really annoying.
How do I force Firefox to open all URLs at 100% regardless of the last custom zoom level? I have default zoom already set to 100% in Settings and Zoom Text Only is not enabled.
Thanks.
Not sure what to do as far as the video chat it hasnt popped up yet bold text
No videos play in your browser as of late, maybe 3-4 days. YouTube works, but everything else, Freepik, Twitter, Bluesky, video previews, nothing works.
Hi all, I used to run two Firefox instances on the same computer, each one using a different account (as I mentioned in the Subject), but I don't remember how I managed t… (read more)
Hi all, I used to run two Firefox instances on the same computer, each one using a different account (as I mentioned in the Subject), but I don't remember how I managed this, so now that I moved to a new computer I can't reproduce it! Thanks for helping, if anyone knows. Regards, Mike
Tell me where is the REFRESH button on Firefox,
Pop-up blocker Inable please because of some of site setting pop-up blocked. Please open pop-up option in firefox browser site setting allowed.link text … (read more)
Pop-up blocker Inable please because of some of site setting pop-up blocked. Please open pop-up option in firefox browser site setting allowed.link text
when i click on links, they do not open in new tabs without me having to right click for option. it used to. what changed? it was fine until today (3/14).
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 … (read more)
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 have loved FF desktop browser since I started using it per my boss in 2003. But I am so tired of the fact that EVERY SINGLE TIME you put out an update it breaks my acc… (read more)
I have loved FF desktop browser since I started using it per my boss in 2003. But I am so tired of the fact that EVERY SINGLE TIME you put out an update it breaks my access to the bank. EVERY SINGLE TIME. I waste HOURS reading articles, calling the bank IT dept, chatting with people who are on 3 calls at once, only to hear them tell me to "just use chrome." I clear the cookies, clear the cache, reboot, follow all the prompts in the settings and THEN the damned bank server doesn't recognize the device so it forces yet ANOTHER password change. It happened again TODAY and it makes me so sad but I cannot do it anymore. I am STILL now (going on 4 hours) trying to access the billpay page @ Xantanderbank. (ahem, secure codename) I am forced now, by this craziness, to use the imbecilic duckduckgo which is A) and offensive name and b) you KNOW it nowhere near the product you have built but I CANNOT DO THIS ANYMORE. Thank you for the time it takes to read this diatribe. I appreciate it.
An error occurred during a connection to netfoundation.itslearning.com. PR_CONNECT_RESET_ERROR Error code: PR_CONNECT_RESET_ERROR The page you are trying to view can… (read more)
An error occurred during a connection to netfoundation.itslearning.com. PR_CONNECT_RESET_ERROR
Error code: PR_CONNECT_RESET_ERROR
The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the website owners to inform them of this problem.
I've changed primary email some time ago and wanted to login using a new device. However, login fails with "Incorrect email case" and response contains my old email under… (read more)
I've changed primary email some time ago and wanted to login using a new device. However, login fails with "Incorrect email case" and response contains my old email under "errors[0].extensions". After that, there is another request doing login with old email, which seem to be successful, however the whole operation fail and page only shows "Something went wrong. Please close this tab and try again.". Trying to login directly with an old email leads to "Primary account email required for sign-in" error. Please assist.
i did something to lose formatting when accessing an account. It was ok in the morning, but not in the afternoon.
I don't understand my screen comes up with Firefox then tells tells me to sign in with Mozillo I have no idea how to do that
Like my chanal
Am I understanding this correctly? HTML backup (bookmarks) doesn't support tags and annotations, but JSON backup does, and JSON backup doesn't preserve the website favi… (read more)
Am I understanding this correctly?
HTML backup (bookmarks) doesn't support tags and annotations, but JSON backup does, and JSON backup doesn't preserve the website favicons, but HTML backup does?
So, what I can do, is restore my (saved) bookmarks using JSON backup, then restore the HTML backup, this would get my tags and annotations, and the website favicons back? But the downside, I will need to remove duplicates?