In fairness to Mozilla, Thunderbird, Bugzilla, and a few projects like DMOZ were fairly well received projects. Even recent ones like Firefox Send and their email forwarding service are quite nice additions. On the software side, their investments in in-browser translations are money well spent IMO.

It's the stuff like Firefox OS and Pocket gave the bad rep to Mozilla. I don't know what they were smoking about Pocket, but I can see their thought process in making Firefox OS. Chrome OS eventually did become a mainstream OS, it could have been Firefox OS too, if it has the right people and money.