Never heard of extension collections. Might be a beta thing.

I have not. But reports from a year ago suggest that it’s not what it claims to be. I’m also happy with Firefox as it is. I’ll stay with Firefox for now, thank you for the suggestion.

Just normal Firefox stable works too. They have a Limited selection of extensions, but ublock and noscript are both available.

I tend to swipe (on Android btw) whenever I only have one hand available, and type when I have both. It works really well and barely ever comes up with a wrong with.