While Firefox is pretty great, be under no illusion that it’s a utopia of openness. It’s plugins are signed and quite tightly controlled. They banned the controversial ‘Dissenter’ plug-in seemingly for political reasons, and recently had the expired certificate ‘oops’ that rendered all plugins unusable for a day or so (without fiddly workarounds)

They too could well bend to corporate pressures to limit ad-blocking, they already have the tech that could be used to block widespread use of ad blockers?