I have a problem when trying to enter text in a form (on any webpage) or enter text in the Google search bar embedded in the top section of my Firefox browser. This also happens in a form field if I hit the <Enter> key.
When I start typing sometimes the Firefox "Find bar" opens or I get other strange behavior and am not able to type in the form. Several times when I try to start entering text in a form random text on the webpage is highlighted and the browser freezes up.
Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
Do not click the Reset button on the Safe mode start window or otherwise make changes.
New profile helped NOT A BIT. Very frustrating, coming on the heels of malware search ad infinitum, 2 FF reinstalls, etc. Form-filling works for a few rounds of entry, then it quits - for every entry field in a window - address field, seaerch field, fields within the pages. The cursor blinks, but keyboard doesn't connect. NOTE - I had been having problems two days ago with FF launching and then jumping to the "find" dialogbox yet that stopped happening.