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@sneakypete Adding an extension to Firefox:In the top right corner of Firefox, right under the [X], there is a symbol consisting of 3 horizontal bars.
Poke that.
Then poke settings.
In the side bar, find 'Extensions and Themes'
Poke that.
It should come up in the 'Add-ons Manager', in the 'Extensions' dialog.
At the top is a search dialog, 'Find more add-ons'
Type in 'UBlock' and hit enter.
'UBlock Origin' will be the first returned item.
Poke into it.
When it's dialog page comes up, poke the big green 'Add to Firefox' button,
And follow the brief installation.
Easy. And about the same sort of thing to add extensions to Edge or Chrome.
Note that extensions may not be available (read, working) until the browser is shut off and restarted.
And please don't load your browser up with useless extensions. bare minimum useful ones, fine.