I added VPN to my iPhone and Ipad as well as the wife's . I have it available for my imac, but really don't need that. I am using Norton 360 and Dashlane on my units. they are secure and so far no nasties have arrived. I was more worried when I was uploading data from the computer to my website of having an oportunistic hack following the line of command in.
Anyway, Still I handle what the FireFox does or the safari. I did find that with Weatherlink Live, if I use Firefox, I can look at the page and see the values of each item, but with the safari nope, only the graphics. I figure the nature of the beast.
Each browser has a host of new things to make our lives interesting, especially Firefox 72.0.1