(In reply to Alexei Solonari from comment #38) > Seems like the bug may be related to https://bugzilla.mozilla.org/show_bug.cgi?id=1593390. Okay so I think I've determined this is the issue. Assuming this answer is correct and I understand correctly, someone on [StackOverflow](https://stackoverflow.com/a/57326428) says that using UserDefaults checks the last stored value of the mode on the OS, but not the actual current OS theme. Fixing that issue would therefore fix this. If anyone could put that this bug depends on Bug [1593390](https://bugzilla.mozilla.org/show_bug.cgi?id=1593390) I would appreciate it.
Bug 1558086 Comment 40 Edit History
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(In reply to Alexei Solonari from comment #38) > Seems like the bug may be related to https://bugzilla.mozilla.org/show_bug.cgi?id=1593390. Okay so I think I've determined this is the issue. Assuming this answer is correct and I understand correctly, someone on [StackOverflow](https://stackoverflow.com/a/57326428) says that using UserDefaults checks the last stored value of the mode on the OS, but not the actual current OS theme. Fixing that issue would therefore fix this. If anyone could put that this bug depends on bug 1593390 I would appreciate it.