When I was configuring Ccleaner, I ticked the "Saved Passwords" box under Firefox, assuming this would only affect the browser. I later realized those settings were also affecting Thunderbird, but failed to make the connection between the two events, because I only remembered having enabled the DB compression feature.
He meant he was mistaken, so it wasn't about a bug in CCleaner. He had "Saved passwords" ticked under Mozilla and that's the reason his Thunderbird passwords got cleaned.
From FileForum: This version still has the bug of not being able to distinguish between Thunderbird and Firefox when selecting what should be cleaned. As a result, I cannot clean Firefox passwords without also cleaning Thunderbird passwords.
I support this and have already faced this same problem. Instead of Mozilla/Firefox, CCleaner should offer fully independent Firefox and Thunderbird options to avoid this.
From FileForum: This version still has the bug of not being able to distinguish between Thunderbird and Firefox when selecting what should be cleaned. As a result, I cannot clean Firefox passwords without also cleaning Thunderbird passwords.
I support this and have already faced this same problem. Instead of Mozilla/Firefox, CCleaner should offer fully independent Firefox and Thunderbird options to avoid this.