commit 7d98f3bd4348aa79efe040118763c77c84745173 Author: Georg Koppen gk@torproject.org Date: Tue Dec 4 13:53:12 2018 +0000

Bug 27290: Remove WebGL pref for min capability mode

In Mozilla Bug 1217290, a new WebGL mode was introduced specifically for `privacy.resistFingerprinting` set to `true`, which is supposed to give most machines the same WebGL profile.

Previously, `webgl.min_capability_mode` was used for this purpose, but now that pref is intended strictly for browser testing and it overrides the `privacy.resistFingerprinting` setting. Furthermore, `webgl.min_capability_mode` can cause WebGL to fail unnecessarily.

So we should not be enabling `webgl.min_capability_mode` any more in Tor Browser. This patch is the complement to a tor-browser patch which both remove that preference setting so it reverts to Firefox's default value (false). --- src/chrome/content/torbutton.js | 1 - 1 file changed, 1 deletion(-)

diff --git a/src/chrome/content/torbutton.js b/src/chrome/content/torbutton.js index 8bd847f9..6568570c 100644 --- a/src/chrome/content/torbutton.js +++ b/src/chrome/content/torbutton.js @@ -1551,7 +1551,6 @@ function torbutton_update_disk_prefs() { function torbutton_update_fingerprinting_prefs() { var mode = m_tb_prefs.getBoolPref("privacy.resistFingerprinting");

- m_tb_prefs.setBoolPref("webgl.min_capability_mode", mode); m_tb_prefs.setBoolPref("webgl.disable-extensions", mode); m_tb_prefs.setBoolPref("dom.network.enabled", !mode); m_tb_prefs.setBoolPref("dom.enable_performance", !mode);