To be real, though, somewhere close to 0% (rounded to the third decimal place) of users would agree to grossly inefficient cryptomining in the browser. As a web funding model it is terrible and is almost always akin to malware. It certainly costs the user much more in electricity costs than it will ever benefit web publishers.

Mozilla? Optional protection? Don't trigger my memories.

They also made it optional to block unsigned extensions, which you could turn off if you wanted to tweak one to fix a bug because it wasn't being maintained fast enough.

Like, if you believed in the whole Open Source/tinkering philosophy, or something, which Mozilla may or may not care about.

Then, they started disallowing it in 2016.

And they turned off key remapping too.

For one thing it's probably not a good idea on battery-powered devices, so it's only useful for monetizing desktop browsing. It also means that the money you make out of it depends on the average power your "customer" has available to mine.

Beyond that since mining is a zero-sum game it means that the more people opt for this model, the less money they individually make. Maybe today you make on average 0.001cent per minute and per user and a year from now you make a tenth of that. You have absolutely zero control on it since it's merely a factor of the total hashrate and the cryptocurrency's value.

I have a hard time imagining how this could become mainstream. Tipping using cryptocurrency microtransaction seems more promising but even that is far from a solved problem. I'd rather directly send $.002 to the website rather than waste $.01 of electricity for the website to make $.001 out of it.