After posting my question I looked on MS' own web-site to see what it might tell me. I knew it would only talk it up, but I used the very limited Contact box (80 chrs) to say I'd like to ask a few questions.
Interestingly the site admits that Edge was intended to run only in W10, but due to the popularity (its word!) of 7 have matched it to that, and 8, as well. To me, that is MS admitting it has nothing new to offer, has run out of ideas, that each new OS is the same programme behind new waffle and complexity. Apart from trying to keep ahead of the hackers that MS's almost-monopoly have encouraged, one may ask just what Microsoft's approach really is, and how many of its developments and "up-grades" are genuinely necessary.
The MS site also states that Edge runs on basically the same software as Google Chrome… so is Edge merely Chrome with its own name?.
So essentially, avoid Edge if given the choice. I have not yet discovered how you use Firefox for e-messages. Or is the web-site search tool a totally different thing from the e-post service? I've not seen how and where these two functions separate.
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V8Eng – well, yes. If you buy WIN10, Edge is wrapped up in it.
Clive – WIN 10 may be the "way to go" but that is what MS intends, and to whose benefit? I did install W10 when it was offered free, a year or so after buying this PC with W7, and it was so bad I reverted the system to 7.
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Presently, IE asks if I want it as the default browser, and I answer no. I use Firefox for that.
IE though is both my e-post system and access to web-sites on which I have registered, including this one; and I can't see how, or if, Firefox gives me the same dual service.
Basically then, I leave IE switched off…. but how do I receive and send messages?