Hello, I have some serious problem with firefox. I spent all day to find the solution but i falied. I was trying all the configurations from this post: https://support.mozilla.org/en-US/questions/1171999 gfx.color_management.mode: 0, 1, 2 gfx.color_management.enablev4: ture, false gfx.color_management.rendering_intent; -1, 0, 1, 3 Each one of them combined with other. All failed. What is the problem. I have a new iMac with external monitor (apple thunderbolt display). One the iMac screen everything is ok but on the external monitor, color in firefox is totally different than other browsers and different than iMac. Here is the example of code i use for test. It's not image. Just clear CSS code: https://www.dropbox.com/s/znnuxq1g75169g8/css.png?dl=0 Here is the screenshot from iMac All 3 browsers have the same color: https://www.dropbox.com/s/3nrkw6ljzwo32kn/imac.png?dl=0 And here on external monitor firefox show different color. https://www.dropbox.com/s/c4vl4tlxmech8o8/external.png?dl=0 Firefox is my main browser and i don't want to change it just becasue the color is not working properly. But because i'm the designer i need to have almost the same color on my both screens in browser. Overall both monitors are ok. The problem only exist in Firefox. All other apps are ok. Figma or Photoshop work fine, both screens have the same color. But firefox not. I'm using also Firefox Developer Edition and there is the same problem. Are there any more options i can check before i will change browser? Thanks, Przemek