1527368 - Ensure we can flip adjust-to-low-end-hardware feature using a single pref

Status: RESOLVED WONTFIX

(Firefox :: General, enhancement, P1)

Description

[:Gijs (out for now; he/him)]

+++ This bug was initially created as a clone of Bug #1526517 +++

This will simplify rolling this out as a Shield experiment.

Originally, we had considered using https://github.com/nhnt11/multipreffer to flip the necessary prefs (performance.adjust_to_machine and performance.low_end_machine) to true.

The problem is, however, that there's code here:

https://searchfox.org/mozilla-central/rev/03ebbdab952409640c6857d835d3040bf6f9e2db/toolkit/components/gfx/SanityTest.js#354

That will only update the pref when there are build updates. Shield studies come in separately, and ideally we should have a pref that takes effect immediately from the next startup (even if there isn't another build/update).

Comment 1

[:Gijs (out for now; he/him)]

Given all the data we have at this point, we won't be pursuing this further.