The option being "true" is somewhat a feature of TOR Browser. According to
Mozilla Developer Docs,
and 2D graphics within any compatible web browser without the use of plug-ins.
A Boolean property that, when true, enables a minimum capability mode.
When in this mode, WebGL is configured to only support the bare minimum
feature set and capabilities required by the WebGL specification.
TOR Browser wants to minimize users' digital fingerprint by disabling
webgl.min_capability_mode: "true" is default value. To make it false,
here TOR can be customized with autoconfig.
Assume the TOR is installed in
C:\Tor folder. Create
autoconfig.js file in
C:\Tor\defaults\pref\autoconfig.js path with these lines:
// This line is a comment
firefox.cfg file in
C:\Tor\mozilla.cfg path. Add these following lines:
// This line is comment
The file name should match with the previous preference in
lockPref locks the preference to false. In my opinion, I am not suggesting
to change the default value. TOR does this to anonymize user identity.