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I can't change my defult search engine

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EDWCX
EDWCX
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I suddenly found that I can't change my defult search engine.My defult search engine is always duckduckgo and whatever search engine I choose it will changes back to duckduckgo at once.Any suggestions will be help.

I suddenly found that I can't change my defult search engine.My defult search engine is always duckduckgo and whatever search engine I choose it will changes back to duckduckgo at once.Any suggestions will be help.
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Επιλεγμένη λύση

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or userChrome.css is causing the problem.

  • switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click the "Refresh Firefox" button on the Safe Mode start window

You can rename/remove search.json.mozlz4 in the Firefox profile folder with Firefox closed to rebuild the search engines registry.

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.

Firefox will rebuild search.json.mozlz4 from the builtin search engines.

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cor-el
cor-el
  • Top 25 Contributor
  • Moderator
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Επιλεγμένη λύση

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or userChrome.css is causing the problem.

  • switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click the "Refresh Firefox" button on the Safe Mode start window

You can rename/remove search.json.mozlz4 in the Firefox profile folder with Firefox closed to rebuild the search engines registry.

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.

Firefox will rebuild search.json.mozlz4 from the builtin search engines.

EDWCX
EDWCX Ιδιοκτήτης ερώτησης
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Actually,I start Firefox in Safe Mode at first when I found that problem,but it didn't work.Then I try to solve it by changing the option in about:config,but it didn't work too (maybe there is no option relate to defult search engine).Maybe rename/remove search.json.mozlz4 in the Firefox profile folder can solve it,but I have handle it by reinstall the Firefox.Whatever，I really appreciate it.