The list extensions.quarantinedDomains.list in my Firefox pt-pt (Portugal) is for web site in another country pt-br (Brasil) that don't have interest for most people in pt-pt (Portugal).
I would like to have a way to edit the list, or at least some additional list that I can personalize that the Firefox won't roll back to some default every time it starts again (yes I tried to personalize to the domains and subdomains that matter to me that non fully trustworthy extension can't have access... but Firefox always reverts to default list every time I start it again).
If I could personalize the sub-domains and domains that the extensions can't access if they aren't fully trusted, that should provide better security in the web sites I care the most... so that the security can be extended to the web sites really matter to me.