One of Firefox’s awesome strengths is its vast manner at which it can be tweaked or configured. The browser extension model is no longer unique to Firefox but it still remains arguably the best. Chances are, if you’ve used Firefox long enough you’ve also dabbled in about:config - the under-the-hood preferences system where Firefox can really be customized to fit your needs. While not for the faint of heart, about:config is still relatively painless to dive into.

If you heavily rely on the array of about:config changes you’ve made over the years you no doubt realize the pain that is involved when you move to a new computer or otherwise have to reinstall Firefox and thus lose all that customizing. The user-modified preferences are in bold in the listing but that will entail an awful lot of scrolling to locate them all. Instead, you can pull out just the preferences you changed with the lesser known about:support though the Firefox address bar.

Once in about:support scroll down to the section titled Modified Preferences. While this isn’t entirely stream-lined if you are wanting to transfer the settings to another install – you’ll have to apply them all manually unfortunately – you can at least grab a complete listing of the tweaks, which can then be copy and pasted into a file for later use.

Know of a better method to apply customizations on a different Firefox install? Let me know in the comments!