About:config in Firefox changes list?



About:config in Firefox changes list?

I changed one too many settings in about:config in the latest version of firefox, and now I am getting lag on opening multiple tabs. The lag is short but noticeable, and I don’t like it.

My questions are

  1. Is there any way to undo specific boolean/integer changes, is there a record kept of what’s changed in the last 3 months Of course, I like some of the changes, but not all of them. Once I see a list of changes made, I will remember which specific changes messed up my browsing.

  2. How do I go back to default settings in about:config?



I don’t have access to Firefox right now but I thought that FF keeps track of the manual changes you’ve made in about:config, no?


I remember now. In about:config under status it will be either ‘default’ or ‘user set’, something like that.
If you need a list of what’s what and the default values check here:



It puts everything you have changed in bold also.