v12.10.0

Summary

• Added checkbox to homepage, where if checked, will route users through the FxA OAuth flow rather than to breach results. (#1665) This is a graduation of the previous Growth team experiment (#1587).

Changelog

Pontoon / Localization updates have been omitted:

21aece3 Revised language filter to only check for "en", rather than "en-US"
7c8d310 Added FxA meta data to the FeaturedBreach logo, adjusted logic to add same functionality to that button if checked.
fa24de4 Added logic to only add the listener when submit element exists
68b56e8 Added type-check for emailWatch argument of doOauth function
f60909a Rewrote logic inside of doOauth to reduce usage of nested if statements, let variable declarations
59ee6bb Added new visual baseline images for the homepage
bd54186 Fixed lint error, moved new GA ping to occur only on homepage FxA engagement events
8294149 Added language filter to only display checkbox for users who has EN* language set as their primary language choice.
8740351 Fixed #1665 - Added FxA checkbox to the homepage (Graduating Growth Experiment #1)