For now, you can bypass this issue by typing about:about<enter> in the address bar. Then choose the link you want.

Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options) key, and then starting Firefox. Is the problem still there?

On Windows, pressing and release the F10 or Alt key should activate the classic menu bar, which provides an alternate way to access many functions.

I suspect this problem is caused by an extension, so going to Tools > Add-ons makes sense to me, too.

Thanks for replying to my post FredMcD but it didn't work, on entering about:about<enter> nothing came down except a choice of ways to browse with like Yahoo and Amazon. Can you suggest anything else as any help is greatly appreciated.

Hi Jscher2000 Did you mean to have Firefox open when pressing the F10 or Alt key, because if so I tried it and nothing happened. I'm not sure what to try next any suggestions ? Can I ask when I disable an add-on do I restart my computer between each disabling of an extension, or do I do it without the restart ? Thanks

Hi Jumbochick, yes, while Firefox is active, Alt or F10 usually activates the menu bar.

Another way to open the Add-ons page is to type or paste the following in the Start menu search box and press Enter to execute it:

firefox.exe -url "about:addons"

Often a link will appear above at least one extension you disable or remove that indicates you will need to restart Firefox before the change takes effect. You can complete your work on the tab and click one of the links as the last step.

Any improvement?