How To Optimize Firefox By Tweaking Hidden Settings In The "about:config" Page
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
Config.json settings - Terraria Wiki
Show Only Modified Preferences on About:Config in Firefox
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Tip] How to Access Hidden Secret “About:Config” Editor Page in Mozilla Thunderbird – AskVG
Need help with some about:config settings | Firefox Support Forum | Mozilla Support
Show Only Modified Preferences on About:Config in Firefox