This is a sub-issue of the larger fingerprint defense reorganization issue: #8787

Previous implementation blocked all WebGL-specific parameters, at max level only, and did nothing at default level.

New implementation:

At max level, block these WebGL2-specific parameters:

• version
• shading language version
• read buffer binding
• write buffer binding
• framebuffer binding
• max vertex uniform components
• max vertex uniform blocks
• max vertex output components
• max varying components
• max transform feedback interleaved components
• max fragment uniform components
• max fragment uniform blocks
• max fragment input components
• max uniform buffer bindings
• max combined uniform blocks
• max combined vertex uniform components
• max combined fragment uniform components

At default level, farble these WebGL2-specific parameters:

• max vertex uniform components
• max vertex uniform blocks
• max vertex output components
• max varying components
• max transform feedback interleaved components
• max fragment uniform components
• max fragment uniform blocks
• max fragment input components
• max uniform buffer bindings
• max combined uniform blocks
• max combined vertex uniform components
• max combined fragment uniform components