Low quality of Facebook images

[Narga]

Hello,
I'm wondering who's same problem with me? After changed to Mull and login tom Facebook, all the images and photos on my feed is very low quality, broken pixels and blurry even I turned on the desktop site option.
I tried to changing some settings but it's not fixed. Just only Facebook, not on Instagram or Pinterest (or maybe it's looking not bad compared with the normal browsers)

How could I fix it. Thanks

[SkewedZeppelin]

You can try this

Mull has stripped referrers. This often breaks loading of images on websites with hotlink protection. Navigate to about:config and change network.http.referer.XOriginPolicy from 2 to 1, this is however a privacy risk.

but it may also just be privacy.resistFingerprinting sending spoofed screen parameters which cause them to serve up lower resolution images or something, that that setting is the main point of Mull so please don't disable it

[Narga]

I tried to changing the value but it's still the same. Even I set it to 0. I guess that flag is not the cause of this problem.

[Narga]

I guess this is the cause of my problem.
https://bugzilla.mozilla.org/show_bug.cgi?id=1232091