• A few things come to mind:

    The “Mr. Robot” promotion was pretty bad - they force installed an extension without user interaction. This is IMHO still the worst thing they’ve done.

    Their finances could be seen as a little sketchy, at times, like executive pay vs. layoffs at the start of COVID. The fact that they’re hanging off the teat of Google (or maybe Microsoft, which ever search engine has the higher bid at the moment) could also be seen as a conflict of interest.

    Some might criticise Mozilla for a lack of focus. While Firefox was getting stale they invested in Pocket, and VPNs and stuff.

    It’s a thing of the past, but there was this whole thing about Brendan Eich …

    Honestly most of these things seem pretty par for the course under capitalism.