Could you turn off any compatibility settings on your Firefox shortcut?

To do that, find the icon you use the start Firefox, and either:

• Right-click a desktop shortcut, then click Properties
• Right-click a Firefox icon pinned to the Taskbar then right-click Mozilla Firefox, then click Properties

You should clear all the boxes on the Compatibility tab for best results (giant screenshot below).

Any difference the next time you start Firefox?

If the updater doesn't migrate you to 64-bit Firefox, you could update manually. Please see this article for tips on that: How to switch from 32-bit to 64-bit Firefox.

If you use Microsoft Office: Please temporarily switch your default browser to Internet Explorer before uninstalling 32-bit Firefox to avoid the problem described in this article: https://www.slipstick.com/problems/this-operation-has-been-cancelled-due-to-restrictions/

"Could you turn off any compatibility settings on your Firefox shortcut?" No compatibility boxes are checked.

Hi DavidBassPlayer, what version of Windows are you running now? In a January post you wrote "Windows 7 Home Premium 64 bit" but your browser reported itself as running on Vista. If Firefox was not confused because of compatibility settings, try this: How to reset the default user agent on Firefox.

DavidBassPlayer said

"Could you turn off any compatibility settings on your Firefox shortcut?" No compatibility boxes are checked.

You should actually have started a new thread instead of asking for help in two existing threads.

This way we can what your useragent is also.

Based on your past threads over the last four years it appears as you had a useragent showing as if you have Vista (NT 6.0) and not Windows 7 (NT 6.1) each time in More System Details on right of OP. /questions/1200908 /questions/1082238 /questions/1019781

So either you have been running Firefox in Windows Vista compatibility mode or the useragent was modified over time either by a useragent related extension or manually by you.

First thank you all for quick and useful responses.

I have not yet had opportunity to do as suggested above, "try this: How to reset the default user agent on Firefox." (link didn't survive, please see above.) I will do at the earliest opportunity.

I have not changed any settings. W7 was installed at the factory in 2011, and Firefox soon thereafter, in spite of being badgered by my tech friends to use Chrome. I trust Firefox. It doesn't report to "big brother"

I have never run Vista, my OS claims to be 64 bit W7 Home Premium. but a number of other programs seem think it is not W7 and refuse to update. 

Finally, I am a real neophyte with Mozilla Support. I know not to hijack a thread, and thought my issue was the one being discussed.

I have had very few issues wth Firefox other than run away memory use with this version of Firefox. I'm hoping the new version will fix that. I don't post much.

I took the time to do as suggested, but there was no mechanism indicated to tell whether I was successful. "Help" still says I cannot perform further updates to Firefox on this system. Suggestions?

WInver, run from the command line, says Windows 7 Home Premium NT 6.1 build 7601 Service Pack 1 But FF still says I cannot do more updates.

I want to update to Quantum. I in fact have downloaded the FF Quantum installer but am concerned about untoward consequence of running it.

Hi DavidBassPlayer, could you check the Troubleshooting Information page. Either:

• "3-bar" menu button > "?" Help > Troubleshooting Information
• (menu bar) Help > Troubleshooting Information
• type or paste about:support in the address bar and press Enter

In the first table on the page, on the OS row, what does Firefox show? For reference, Windows_NT 6.1 = Windows 7.

Thank you. I did as you suggest, results say FF thinks I'm running Vista:

User Agent Mozilla/5.0 (Windows NT 6.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0

OS Windows_NT 6.0

If asked, I can post a screen shot of winver output stating that I'm running NT 6.1, as I state above.

I attempted to fix this as someone suggested earlier, but that did not help.

Hi DavidBassPlayer, when Firefox queries Windows to find out what version is running on, it is being told Vista. The only way I know of to fool Firefox into thinking it is running on an older version of Windows is the Compatibility settings which you can access through its shortcut. (Windows version is the top setting in the Windows 7 screenshot above.) There could be another way that I'm not aware of. But I'm not aware of it.

Thank you , jscher2000 I really am running NT 6.1 I see no compatibilty settings when I right click the shortcut, but I'll right click again and see if the compatibilty mode includes the possibility of running NT 6.1 I'll also go to the binary in C:\program files (x86) and right click the binary.

I'll also do another google search and see if there's another way.

Meanwhile, I'm hoping someone can tell me how to make FF report the truth.

Happy Happy, Joy Joy!! I realized there is one link that I have NOT looked at: The one in the start menu, that the task bar icon links through to the .exe.

And THERE IS WAS' exactly as suggested "run in compatibility mode: Vista". I changed that to Window 7 Here's what trouble shooting infomation says now:

Update Channel esr User Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0 OS Windows_NT 6.1

THANK YOU! THANK YOU!

DavidBassPlayer said

And THERE IS WAS' exactly as suggested "run in compatibility mode: Vista". I changed that to Window 7

So instead of unchecking the [] Run this program in compatibility mode box, you set it to run in Windows 7 compatibility mode?

Now that you fixed what windows mode Firefox is running as, if you were to do a internal software update in Firefox it will serve you the Firefox 60.2.0 ESR.

So if you want the current Release download from www.mozilla.org/firefox/all/