First, you need to add the Install Chrome Extentions plugin for Opera.
Next, go to the Chrome Web Store and find the Grammarly extension. This i...
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I would highly recommend Vivaldi browser. It's essentially an Opera-like UI on the front and Chromium underneath. Install add-ons straight from the Chrome Add-On Site.
I switched to Vivaldi for a week as default and I haven't switched back. No regrets.
I've tried it, but couldn't get in with it. The update mechanic annoyed me.
I do a lot of cross browser testing so I frequently use many different browsers installed, end up using most of them for something!
I've downloaded but looks like it's not supported
I'll take a look. This might need updating.
it's working now, it turns out that I need to restart opera in order for the extension to work.