Forum der Gemeinschaft Firefox

Since I upgraded from FF128-esr to FF140-esr I always get the "Firefox is being updated by another instance" This is really driving me crazy, as I checked / did / .... everything (and even more) I found on the internet related to that.

Nothing helps !

Creating and using a new default profile didn't help

Finally I ended up uninstalling FF completely (making sure no -zero- leftovers remained in ProgramFiles, AppData a.s.o.), and reinstalled FF140.7.0-esr freshly. After installation I started FF immediately with the created default profile (only existing one) --> SAME THING : "Firefox is being updated by another instance"

And this is really a FF140 thing, when I go back to FF128, on the same computer, same profiles, ...., the problem is gone.

I would like to know in detail what checks are really done by FF to decide to give that "Firefox is being updated by another instance"

Recently updated from 148 to 152 and it has added these dropdowns to both the address and search bars (see below screenshot) that require additional clicks to get past that I do not want. Ideally I would not have these (or would maybe have the search drop down appear AFTER the search field itself).

Behavior I don't want: searches to appear in address bar. Behavior I don't want: search drop down to appear in address bar at all. I require a clear delineation in my workflow for things I have actually visited (addresses) and things I am planning to visit (searches). Behavior I don't want: search drop down to appear in search bar between address bar and search bar (one tab click should take me from address bar to search bar - now it takes two tab clicks because of this drop down).

Resolutions I have tried: Going to "Settings > Search Engine Suggestions" and completely unclicking "show search suggestions". Going to "about:config" and setting the following fields to false: browser.urlbar.suggest.searches keyword.enabled browser.fixup.alternate.enabled

None of these actually remove the dropdown entirely from either the address bar or search bar.

How do I remove these drop downs aside from downgrading back to 148?

Hi,

After the last two updates, the **Pseudo-elements** tab in the Browser Console can no longer be closed once it has been opened, and vice versa.

Please see the video below demonstrating the issue:

https://www.awesomescreenshot.com/video/54512049?key=4422b692b5131ae71def568f54d6f82d

Thanks.

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

As the title says, with both with https and http firefox displays this warning:

https://i.imgur.com/MQLsaCk.png

But no way to bypass it, trying to login to my ubiquiti edgerouter at http://192.168.1.1 or https://192.168.1.1

What can i do?

It is been like 6 or 7 months now since i move to new pc and i been using firefox in this new pc together with other browsers. I am not really using firefox for anything related to google or gmail but just other website that have 0 relation to them. But i have still logged in my main accounts in firefox. It is been twice that once in a while, when i have to check my gmail accounts, all of them disappear and all i see is just sign in page only. There is no log in again or Please log in to this address or that address but straight up fresh page of google sign in page. I still logged back in when it first happened because i heard about the bug that happened with firefox update but now it happen again. It is as if my cookies just vanished but no, other sites still got their own cookies and there is many cache of other website here. other than my google accounts. What is happening here. Is my firefox bugged or something? Should i reinstall and have to relogin everything "again?"

July 13, 2026

In Windows 10, FIREFOX is preventing the proper operation of the Windows 10 feature called MOUSE KEYS when FIREFOX is operating. MOUSE KEYS is a very important capability to individuals with certain disabilities.

MOUSE KEYS enables the use of the numbered keys on the NUMERIC KEYPAD to be used to move the cursor around when the NUM LOCK key is turned ON, as a substitute for using a mouse. Does Mozilla have a way to prevent FIREFOX from defeating this MOUSE KEYS feature?

Google AI indicated that there is a solution specifically for FIREFOX. That capability is built into FIREFOX and begins by using "about:config" to reset a parameter named "permissions.default.shortcuts" from either "0" or "1" to "2". I successfully implemented the steps in this solution by changing that value from its default value of "0" in my computer system, to "2", but no change resulted. MOUSE KEYS continued to malfunction in the same way.

After exhaustive testing looking for a pattern, I finally found one. The malfunction appears to be the following: With the MOUSE KEYS feature activated in the WINDOWS 10 set up, and with NUM LOCK turned ON to assure that this function is ON, each of the numeric keys, 0 through 9 on the keypad, cycles through the different MOUSE KEYS functions of all ten of these keys, in ascending order by their number. For example, if you press key 7 for ten times in a row, it will cycle through each of the ten MOUSE KEYS functions associated with the keys 0-9 to occur, returning on the tenth press to the function that was executed the first time that key 7 was pressed, and so one endlessly through multiple cycles. And similarly for each of the other ten numbered keys.

A similar type of malfunction of MOUSE KEYS occurs with any BROWSER program that I have tried, including GOOGLE CHROME and BRAVE. I gather from GOOGLE AI that browser programs INTERCEPT the codes generated by the numeric keys on the numeric key pad and change those codes before sending the codes to the WINDOWS 10 operating system, and thus to MOUSE KEYS, for execution, causing this problem.

Is there a solution for FIREFOX what will restore the proper function of the MOUSE KEYS feature of Windows 10, when FIREFOX is being used? Thank you for any help that you can provide.

Until a week or so ago this site ( https://sites.google.com/view/lve-construction/july-12-2026 ) displayed photos without a problem. It no longer does, just empty boxes. I have not changed any settings on Firefox. Both Edge & Chrome display without issues. See empty image.

When I try to enter the VA site (https://www.va.gov/my-health) it never opens (see attachment). I use my back-up browse (Microsoft Edge) and I can enter the site. Can you help?

Jerry Clausing Riverside, UT 84334

Until the most recent version(s) (at least through 148), if I have multiple windows open, the restore tab hotkey (control + shift + t) would open a closed tab in the previous window it had been closed in. Now, it opens the tab in whichever window I currently have focus on. It also used to remember the tab's previous location with regards to order among other tabs; now it opens it at the end of all tabs.

Example: I have two windows open, window A and window B. Window A has 5 tabs; window B has 10 tabs. I close tab 3 of Window B.

Old behavior: Pressing restore tab hotkey (control + shift + t) would cause the closed tab to always open in window B regardless of which window currently had focus, and would open it between tabs 2 and 4, as tab 3 again.

New behavior: Pressing restore tab hotkey (control + shift + t) will now cause the closed tab to open in whichever window has focus, A or B, and open as the last tab; for instance, if I am in window A, it will open as tab 6, if I am in window B, it will now open as tab 10, instead of tab 3.

Is there any way to restore the old behavior? At the very least, to get the windows to separate out the restore tab lists? I don't want tabs restoring to incorrect windows.

In Protonmail (or is it Firefox?), while reading email I discovered that my tabs apparently disappeared, but then I discovered that my tabs and my Protonmail are now in separate browser windows. Is that because of the update, or something else? I really want my browser to keep my Protonmail tab in the same browser window. HELP.

Hello: Suddenly when I go to click on a hyperlink in the body of an email, nothing happens. (I might see the pinwheel for a few seconds, but that vanishes and nothing is opened).

I am using: Firefox 152.0.5 (64-bit) Windows 10 Roadrunner email through Spectrum

Is this a Firefox issue or an email issue? Thanks in advance for any help!

При открытии видео на ютубе в место плеера серый экран, при открытии в других браузерах, он работает.Если смотреть видео в других местах,типо вк видео всё работает.Так стало недавно, около 2 дней назад,до этого всё работало.

I tried to login to Autodesk for some discussion about file retention, etc. I logged in using my user id and password and then Autodesk sent me a code as a two factor identification function. When the page opened the place to enter the code it looked like the image that I have attached. I could not enter the code supplied by Autodesk as FireFox kept trying to get me to do something with email masks. Is there anything I can do to fix it?