webgl.disable-extensions true about:config setting may allow DoS and breaks websites
Reference #3323 (closed) and #6370 (closed) ...
"The conclusion is that if we set webgl.min_capability_mode and webgl.disable-extensions, our primary API-level fingerprinting concerns are addressed."
However, I am concerned because this presumably disables security extensions such as GL_ARB_robustness too, making it easier for malicious content to cause crashes on the user's computer (some of which can lead to things such as remote code execution).