I-Firefox Community Forum

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"

I'm running Firefox on Win10 with no options to upgrade to 11. Since the latest firefox update installed, I'm getting a screen that says "Oops, something's wrong," and then I'm kicked out of gmail. A screen asks about sending a report to Firefox, which I check OK for. Today this is happening about every minute to 30 seconds . What needs to happen?

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?

I am having the problem a fix was created for previously where attempts to sign in to my google account continually redirect to a request to clear cache and cookies. Have done so multiple times, still can't log in. Can log in on Chrome so definitely a Firefox-specific issue.

We have resolved an issue with Google prompting users to ‘clear cookies and site data’ when logging in. A fix has been published, via Firefox remote settings that does not require a Firefox upgrade. Users will receive the update over the next 6hrs, if you would like to update immediately simply restart Firefox.

Note: The issue was related to CHIPS being enabled in Fx131, this feature has been temporarily disabled while we resolve the issues. Users who have disabled 'Allow Firefox to install and run studies' in Privacy & Security settings will need to enable to receive the update.

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

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.

After updating Firefox to a newer version, some websites that previously worked on the older version started displaying **"Page Not Secure"** and **"Page Expired"** errors, preventing them from loading correctly.

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.

Over the years I've added dozens of additional search engines; periodically I've "archived" lesser used search engines by toggling their visibility (to reduce clutter and speed up my search process), and when an "archived" engine becomes relevant to me again I've simply toggled the engine back to a visible state. However, as of version 152, this functionality appears to have been removed for user-added search engines. Is there a way to restore this functionality?

I've searched here and elsewhere on the web for a workaround, and perused the about:config variables, but have not been able to find anything. The show/hide functionality is still present for builtin search engines, so it seems like there must be some way to restore it for all search engines.

Thanks in advance for your help!

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

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?"

Beyond My Experience. As I Bring up Firefox Upper Right Flag Yo Update Firefox. IF I DISMISS, TROUBLE STARTS. FOR NO REASON ACCUWEATHR APPEARS. IF I X Firefox Shuts Down. Instead to Remain Online, I have to Use a Bookmark and Continue. Not in My Bookmarks, How Can I Stop That Annoyance Pop Up. Thanks, Joe

when i open the browser today i noticed that my wallpaper which i've set isn't showing. i tried restarting and refreshing the browser but it didn't work. so i tried to change my wallpaper or see it again by clicking customize, but i only saw that i have allowed my wallpaper, but no picture or another option was shown.

What have you done to the Settings feature? It's a mess with those weird little icons on the side. I am just trying to figure out why my tabs keep closing on me. I can have about six tabs open with intention of going back to them, and then..poof.. they disappear. I went into Settings to see what I might have changed but I can't figure this out.

Hope you can help. thanks.

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.