I cannot provide you with an official answer. But I do all my development in Linux with Firefox being my default browser. When the first prototype of the app is ready, I typically test it in Firefox, Chrome and Edge, both under Linux and Windows.
There seldom are any issues and, when there are, they are typically negligible.
Without being an expert, I find Firefox to be the most standard and reliable browser amongst the three.
Edge is, I believe, a Chromium fork and, therefore, it tends to behave in a similar manner.
Finally, certain minor issues seem to be OS-related rather than browser-related. Such as, for instance, the inability of Chrome and Edge to display Unicode flag emojis under Windows and MacOS and so on.