Option for Firefox Nightly (and Beta, Dev Edition) to report same user agent as stable.

[LongPork]

Firefox Nightly reports a very uncommon user agent string to websites (based on https://coveryourtracks.eff.org/), which makes users more succeptible to tracking. It also means websites that support Firefox Stable sometimes don't recognise Firefox Nightly as a valid version of Firefox.

Having an option to set the user agent to be two versions behind at all times would help.

This is similar to what privacy.resistFingerprinting does, but privacy.resistFingerprinting sets the UA string to the latest ESR version, not the latest stable version, along with a lot of other config changes.

[Jon]

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[wutongtaiwan]

Great