(In reply to Shaoting Huang from comment #3) > Sorry it is me again, I'm using MacOS for the replication of this bug, but still, I'm unable to replicate this. > Here is what I did, > macOS Big Sur Version 11.5.2 > enable HCM thru settings > Nightly build go to address bar and type about:preference and go to Privacy & Security and enable either Strict or Custom, > the Heads up sub section is still readable and not white on white > Is there something in the steps you did not mention or missing? > Thanks You can use a tool called `mozregression`, which is something we use for Mozilla code to find regression ranges. Although in this case, we want to find the fix and we can do this with `mozregression --find-fix`. See here for more [documentation on this tool](https://mozilla.github.io/mozregression/).
Bug 1727785 Comment 6 Edit History
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(In reply to Shaoting Huang from comment #3) > Sorry it is me again, I'm using MacOS for the replication of this bug, but still, I'm unable to replicate this. > Here is what I did, > macOS Big Sur Version 11.5.2 > enable HCM thru settings > Nightly build go to address bar and type about:preference and go to Privacy & Security and enable either Strict or Custom, > the Heads up sub section is still readable and not white on white > Is there something in the steps you did not mention or missing? > Thanks You can use a tool called `mozregression`, which is something we use for Mozilla code to find regression ranges. Although in this case, we want to find the fix and we can do this with `mozregression --find-fix`. See here for more [documentation on this tool](https://mozilla.github.io/mozregression/). Once you find the commit that fixed this (and it's probably one of the issues that Morgan mentioned in Comment 5) , we can close this issue with a comment saying which bug it was.