1468734 - "layout.css.font-variations.enabled" pref can be unlocked on Windows 7 and Ubuntu using remote Autoconfig

Status: RESOLVED WONTFIX

(Core :: AutoConfig (Mission Control Desktop), defect)

Description

[Cristian Craciun]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0
Build ID: 20180614100146

[Affected versions]:
Nightly 62.0a1

[Affected Platforms]:
Windows 7, Ubuntu 16.04

[Preconditions]:
1.Create a file named autoconfig.js in the location: 
C:\Program Files\Mozilla Firefox\defaults\pref
and add the following text to it: 
"pref("general.config.filename", "firefox.cfg");
pref("general.config.obscure_value", 0);
pref("general.config.sandbox_enabled", true);"

2.Create a file named autoadmin.js on a remote location and add the following text to it: 
"//
unlockPref("layout.css.font-variations.enabled");"

3.Create a file named firefox.cfg in the location: 
C:\Program Files\Firefox Nightly
and add the following text in it:
"//
lockPref("autoadmin.global_config_url","http://yourdomain.com/autoadmin.js");"

[Steps to reproduce]:
1.Launch Firefox
2.Go to about:config and search for "layout.css.font-variations.enabled" pref

[Expected result]:
The "layout.css.font-variations.enabled" pref status should be "locked"

[Actual result]:
The "layout.css.font-variations.enabled" pref status is "default" and the value can be changed

[Note]:
This issue is reproducible only using a remote js file. If the unlockPref("layout.css.font-variations.enabled") command is written in the "firefox.cfg" file, the pref remains locked.

Comment 1

[Mike Kaply [:mkaply]]

There's not much we can do about this. Locking of prefs is not designed to be permanent, so depending on timing, it can be unlocked.