Let's try an experiment;

Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options) key, and then starting Firefox. A small dialog should appear. Click Start In Safe Mode (not Refresh).

While still in Safe Mode,

Drop that window to the taskbar (minimize). Now try your shortcuts leaving the first window alone.

Is the problem still there?

Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen or hold down the Shift key) to see if that has effect.

• http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/
• http://www.7tutorials.com/4-ways-boot-safe-mode-windows-10

FredMcD said

Let's try an experiment; Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options) key, and then starting Firefox. A small dialog should appear. Click Start In Safe Mode (not Refresh). While still in Safe Mode, Drop that window to the taskbar (minimize). Now try your shortcuts leaving the first window alone. Is the problem still there?

That technique makes it work. But I did not minimize anything. Here is what I did....

Whlle on desktop hold down shift key and press icon that is setup to go to a website using default browser (firefox) that worked for any site. but if the shift key is not pressed (normal mode) thent it does not go to desired site just to the home blank site Does not affect another win10 computer using same fox version but with fewer add-ons (just abp)

So far I could not start OS in safe mode. Need to read more instructions. Thanks for the help so far. George

cor-el said

Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen or hold down the Shift key) to see if that has effect.

• http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/
• http://www.7tutorials.com/4-ways-boot-safe-mode-windows-10

Could not start computer is safe mode. Will read more instructions and try again and report back after I start it that way. The workaround suggested by your colleague does work. Hold shift key down while clicking on icon. This does not happen on my other win10 computer using same version of Firefox. The add-ons are different.

On this computer this started after the recent update. Thanks for the help so far. George George

Sirk said

That technique makes it work. But I did not minimize anything.

Minimize was just to get that first window out of the way.

It could be the work of one of your add-ons. Type about:addons<enter> in the address bar to open your Add-ons Manager. Hot key; <Control>(Mac=<Command>)<Shift> A)

In the Add-ons Manager, on the left, select Extensions. Disable a few add-ons, then Restart Firefox.

Some added toolbar and anti-virus add-ons are known to cause Firefox issues. Disable All of them.

If the problem continues, disable some more (restarting FF). Continue until the problem is gone. After, you know what group is causing the issue. Re-enable the last group ONE AT A TIME (restarting FF) until the problem returns.

Once you think you found the problem, disable that and re-enable all the others, then restart again. Let us know who the suspect is, detective.

Found the add-on that is causing me the problem. It is "Find Wide" Disabled it. It now works normally.

Thanks for the help George

That was very good work. Well done. Please flag your last post as Solved Problem so others will know.

I did mark it solved into your reply e-mail. Is this the place to do it. I noticed to reply to your memo I click on the 'solved' green buttton I assumed that it gets recorded that way, I would like to know the correct way of doing this. Please let me know so that I can do it correctly another time. Thanks George

You did it. Nice job.