what if chrome goes and adds this api too though, also maybe try more strict checking?

stuff like Error().fileName != (void 0) has worked for a long time to detect firefox.

My first idea was to call the getBrowserInfo() function if it exists and check the result. Unfortunately, it's async, so that would require additional changes in each place that needs to check the browser.

stuff like Error().fileName != (void 0) has worked for a long time to detect firefox.

That's probably better. We could also just check the userAgent - some addons already do that.

My first idea was to call the getBrowserInfo() function if it exists and check the result. Unfortunately, it's async, so that would require additional changes in each place that needs to check the browser.

stuff like Error().fileName != (void 0) has worked for a long time to detect firefox.

That's probably better. We could also just check the userAgent - some addons already do that.

yeah that is what I do when I am to bored to get feature based detection, I do the error thing and the userAgent. (though the user agent lies sometimes)

I've changed the detection code so that it works outside the extension context. I used Error.fileName as suggested by @yuri-kiss, but that can be easily changed if needed.