When I am in the middle of typing in a search term, or hit enter after typing, or hit next at the bottom of a search result page I get a window with "search application/json" constantly. It is extremely annoying, can anyone tell me how to stop this?
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.
This problem might occur if you use the addon "FastestFox". Disable the autopage-function in FastestFox and delete all Google-cookies (or cookies set by the search engine you used) . I had the same problem and found this solution in the web... And it works.