Can anyone tell me how make the shift+f10 stop giving me this navigation/ source screen stop . It was not there prior to the latest update so how can I fix it?

Oh, wow, for me Shift+F10 displays the right-click context menu relevant to the position of the cursor. It seems to work in other Windows applications, too. That's really useful -- for me, but apparently not for you.

Can anyone tell me how make the shift+f10 stop giving me this navigation/ source screen stop.

That doesn't sound like what I see. Can you capture a screen shot of it?

Where was Shift+F10 defined to "perform a repetitive function": was that in the site itself, in an add-on, or through another program running on your system?

jscher2000 said

Oh, wow, for me Shift+F10 displays the right-click context menu relevant to the position of the cursor. It seems to work in other Windows applications, too. That's really useful -- for me, but apparently not for you. That is the window I mean. My purchasing website uses the shift+f10 to put "profiles" on a seasonal product but you have to hit it 3 times to make it stick. All was well until recently. Is there a way to disable it? I saw an add-on that said it could fix it but I cannot find it now.

That was odd. I am not sure why it combined your reply with mine. Oh well.

I suggest asking the site. Maybe something they were doing to intercept that keyboard combination stopped working in Firefox 48.0.2 (that was released several weeks ago so if it's a problem on their site, they should have an answer by now).

But first, have you tried "the usual":

When you have a problem with one particular site, a good "first thing to try" is clearing your Firefox cache and deleting your saved cookies for the site.

(1) Clear Firefox's Cache

See: How to clear the Firefox cache

If you have a large hard drive, this might take a few minutes. If you do not see the number going down on the page, you can reload it using Ctrl+r to check progress.

(2) Remove the site's cookies (save any pending work first). While viewing a page on the site, try either:

• right-click (on Mac Ctrl+click) a blank area of the page and choose View Page Info > Security > "View Cookies"
• (menu bar) Tools > Page Info > Security > "View Cookies"
• click the padlock or "i" icon in the address bar, then the ">" button, then More Information, and finally the "View Cookies" button

In the dialog that opens, the current site should be pre-filled in the search box at the top of the dialog so you can remove that site's cookies individually.

Then try reloading the page. Does that help?

I cleared the cache and discovered that the website does not use cookies so I contacted them. They said they are aware of it but that there was nothing they could do. Helpfull!!

Thank you for trying.

Could you test the site in the Extended Support Release ("ESR") version of Firefox 45? This would help us learn whether it is an issue with the site that affects all Firefox versions, or whether it is specific to Firefox 48. Assuming they didn't already tell you...

One way to test with minimal disruption is to download a "portable" version. That loads into a separate folder (for example, you can just run it out of a folder under Downloads) and doesn't share your Firefox settings:

http://portableapps.com/apps/internet/firefox-portable-esr

Works like a champ. No issues. Is that designed for use on tablets and the like?

I think the concept was that if you had to use a public or a friend's computer, you could bring all your favorite programs on a USB flash drive. (They only work on Windows, unless they've branched out.)

So maybe there was a change in Firefox 48 that broke their keyboard interception script, or maybe there's a setting or add-on in your current Firefox 48 profile that is causing the problem.

At least you have a workaround for the time being (I have to run and can't provide further suggestions at the moment).