In firefox default state, search doesn't work when I click on magnifying glass
Firefox was running slow sometimes, so I set it back to default mode (state). The search engine on the right doesn't work when I click on the magnifying glass with a seach term included in the little window. However, I can search by typing a search term in the web address window.
Opaite Mbohovái (1)
Try to delete the search.json file and possible search-metadata.json and search.sqlite files in the Firefox profile folder to reset the search engines to the default.
Firefox will rebuild the search.json file from the default search engines in the "browser\searchplugins" folder in the Firefox program folder and the searchplugins folder in the Firefox profile folder.
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