The ‘yawn’ bit. Try and get a PC to check all is well on Edge or IE
it’s so tough to do all that platform testing. there really are so many things now. but if you’re trying to reach a broad market then you’ll want to hit all the basics:
iphone mobile safari + a couple iOS versons back if you an find a device for that
remember with mobile to test in both orientations. some folks like to browse in landscape mode
chrome, edge, firefox. remember to test on a very small screen (as well as 1080p) as some of the windows tablets have limited screensizes.
chrome, safari, firefox. yes you should hit firefox. it’s become a good browser again. really, give it a try. i’m using firefox right now. it’s crazy fast.
chrome on mac should just about cover chromium on linux except for the available fonts and a few other random. honestly, i’ve not once tested on linux before launch – and i’m a regular linux user. LOL.
there are some more exotic scenarios like web browsing TVs and such – but these are very market specific and often require herculean effort to get great results – so only go there if you must.
lastly: use chrome or safari dev tools responsive mode to test A LOT of different screen sizes. even just with apple devices there are a simply stunning number of possibilities. there are some destops with smaller screens than some iOS devices there iOS sidebars that a new twist, and zoom modes that change the overall resolution.
an iPhone SE (still currently sold i think) has a screen size of 1136x640 and an iMac Pro has a native resolution of 5120×2880. if i did my math right that’s about 20,000% the number of pixels. your design is going to need to be a bit flexible.