Start Firefox in Safe Mode {web link} While you are in safe mode;

Type about:preferences#advanced<Enter> in the address bar.

Under Advanced, Select General. Look for and turn off Use Hardware Acceleration.

Poke around safe web sites. Are there any problems?

No good; it still doesn't solve the search problem. I'm adding a capture of the screen for a test, with a search done via the search bar and Bing. Interestingly, the search box on a "fresh" tab (with my frequently-visited sites displayed on it) works fine, such as the second picture. Does this help?

Bruce

I noticed the screen is all white. Click in the address bar, and press Enter.

The "white screen" is what comes up when I try a search from the search bar -- a completely blank tab. Putting a cursor in the address bar from this point and pressing enter does seem to complete the search, though. Interesting; why is it stalling halfway through the process?

Did you run Firefox in Safe Mode? Was the problem still there?

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 it. Sad to say, but it's one of my favorites, Tab Mix Plus. It was working fine before, and it's one of the best extensions I've ever had. Looks like I'll need to find a different tab extension until they get it fixed.

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

Make sure you contact their support site.

Fresh information: it appears I wasn't up to date on Tab Mix Plus after all. However, I checked for updates from the add-ons tab, and it said nothing was available. I only found the 0.4.1.6 update after the developer sent me a message. TM+ seems to be working now. I think we can leave this thread closed, but I'd wonder about the update checker a little...?

The update checker has to be told when a new version comes out.

Understood; thanks much.

Same issue, but mine I noticed that the Search bar calls the HTTPS version of the page, which is what errors, so all you need do FOR NOW, until the search bar call is fixed to NOT call the secure version of the search pages (hint to mozilla) is to just delete the "s" from "https" and hit enter, then the NORMAL page you are used to loads as normal.