URP: post processing not shown in browsers?

Hi

• Untiy 2019.3.0f6,
• unmodified URP template
• unmodified sample scene
• WebGL2.0
• Linear color space

in the editor, the standard URP sample scene looks like this. Notice the glow on the wood:


In Chrome and Firefox however, it looks like this. No Glow. Does postprocessing not work in WebGL? The Colors also look a bit faded.

 

Here's a more clear comparison. What is the reason for the darker colors and the lack of post processing effects?
I really want to use WebGL for a kind of hi-end graphics application..



And Firefox and Chrome also have different colors:

 

Using Gamma instead of Linear color space seem to fix the problems. However, I would prefer to use Linear space.
Strangely, linear color space was supposed to bring post processing effects to WebGL, but in my experience it is the opposite!

 

yes post processing bugging out in webgl unity do something