There was another thread today about problems with right-clicking in the Google search box on their home page -- it doesn't show the usual Firefox context menu. Is that the issue you're seeing, too?

Here are a few different workarounds:

(1) Hold down the Shift key when right-clicking

This tells Firefox you don't care whether the site is taking over the context menu function, you want to see Firefox's built-in context menu.

(2) Paste using a keyboard shortcut

That's Ctrl+V on Windows. (Or Shift+Insert if you are very dextrous.)

(3) Change a setting so that Firefox's context menu always shows even if the site is trying to do something different in response to a right-click

This can be inconvenient when you actually do want to use the site's custom menus, but I'll mention it in case you were using this setting before and recently switched it:

(a) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button accepting the risk.

(b) In the search box in the page, type or paste context and pause while the list is filtered

(c) To force Firefox's menu: Double-click the dom.event.contextmenu.enabled preference to switch the value from true to false

With that in place, you may sometimes need to tap the Alt key to "peel off" Firefox's menu from in front of site menus.

Any luck?

Sorry to take so long to get back. The problem just fixed itself just as suddenly as it happened. Maybe the problem was at google's end. I don't think firefox updated anything.