Update user-agent regexes for Firefox 100

[legoktm]

Description

See https://hacks.mozilla.org/2022/02/version-100-in-chrome-and-firefox/.

Firefox is going to hit major version 100 soon, which means our regexes that match against a 2 digit major version will stop working.

Steps to Reproduce

In source.js:

const TBB_UA_REGEX = /Mozilla\/5\.0 \((Windows NT 10\.0|X11; Linux x86_64|Macintosh; Intel Mac OS X 10\.[0-9]{2}|Windows NT 10\.0; Win64; x64|Android; Mobile); rv:[0-9]{2}\.0\) Gecko\/20100101 Firefox\/([0-9]{2})\.0/
const ORFOX_UA_REGEX = /Mozilla\/5\.0 \(Android; Mobile; rv:[0-9]{2}\.0\) Gecko\/20100101 Firefox\/([0-9]{2})\.0/;

The current TBB UA is Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Firefox/91.0. Presumably it'll be s/91\.0/100.0/g whenever the time comes.

Expected Behavior

>>> "Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Firefox/91.0".match(TBB_UA_REGEX)
Array(3) [ "Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Firefox/91.0", "X11; Linux x86_64", "91" ]

Actual Behavior

>>> "Mozilla/5.0 (X11; Linux x86_64; rv:100.0) Gecko/20100101 Firefox/100.0".match(TBB_UA_REGEX)
null

Comments

Given that we specifically look for TBB and Orfox, I don't think we need to rush to meet Chrome's March release date nor Firefox's May one because TBB will be on Firefox 91 ESR for quite a while more.