[Bug] Can't open addon settings if different useragent string is set on Firefox Android Beta

Bug Report

Bug Description

When a different useragent string is set, the addon settings are not accessible.

Steps To Reproduce

Set a different useragent string on Firefox Android Beta (open about:config, create a string-entry with the title general.useragent.override and an Chrome useragent string as content, like Mozilla/5.0 (Linux; Android 10; POCOPHONE F1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.45 Mobile Safari/537.36), now open the addon settings on any website, the addon settings will show Loading, please wait and the page will load forever. If the useragent string is reset, the settings are shown again.

Expected Behavior

Show the addon settings

Actual Behavior

The addon settings will show Loading, please wait and the page will load forever.

System Information

• OS: Android 10
• Browser: Firefox Android Beta 95.0.0-beta.4
• Dark Reader Version: Version 5 Preview 4.9.42 (but this has been going on for a while now…)

[wrhou]

I’d like to see this resolved too (using desktop Firefox, happens there too). That config is meant for websites, not browser extensions.

[Gusted]

Well there are more reliable methods

I’ve had a look at those methods and they seem to use a duck test, “If it walks like a duck, sounds like a duck, acts like a duck, it must be a duck”, which can be very inconsistent between versions and future versions of browsers, as most of these are relying on experimental features, which come and go between releases. UA is currently the method to recognize browsers for dark reader as we need to apply workaround and patches for certain applications as it will otherwise not work(hence why you can’t open addon settings).

Note: It’s really shooting yourself in the foot by using a completely other browser user-agent than the current browser. I’d recommend to use a Addon to do this(which can’t conflict to Dark Reader).