Firefox's privacy.resistFingerprinting option reports a very old User-Agent (50.0)
If your copy of Firefox has been behaving oddly but you can't figure out why, you might want to check the value of your
Starting around Firefox 41, a setting called
privacy.resistFingerprinting was introduced. This option didn't get much fanfare until the release of Firefox 55, when Mozilla announced a litany of features they'd be retrofitting into mainline Firefox from the Tor browser bundle. I decided to enable
privacy.resistFingerprinting in Firefox 56, hoping this preference might obviate the need for one or more of the privacy extensions I use.
After a few days I forgot all about toggling that option. Meanwhile, Firefox had begun acting strangely:
Some sites using Flash were telling me I didn't have Flash installed, despite being in my Flashblock whitelist.
Some sites had miscellaneous elements that stopped functioning properly.
- When I started or restarted Firefox, it came up windowed instead of maximized, even after verifying that `xuls...