Tip] Reset or Restore About:Config Settings to Default in Mozilla Firefox – AskVG
How To Optimize Firefox By Tweaking Hidden Settings In The "about:config" Page
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v.68 about:config settings could be altered to allow local testing; v.69 seems to have more and different settings to change: can you advise please? | Firefox Support Forum | Mozilla Support
How To Optimize Firefox By Tweaking Hidden Settings In The "about:config" Page
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