Well yes, but technologically, it's the only non-KHTML descendant browser engine in development. Mozilla is working on the revenue issue, though it is a considerable concern. The best thing we can do to help Mozilla is to simply use Firefox and try and bump its market share numbers up.
I won't say no, but these donations go to Mozilla Foundation and are used to advance their tech evangelism work, such as their successful lawsuit over net neutrality in the US.
Mozilla Corporation develops Firefox with their income from sources like their contract with Google and other search engines. Donations are not used for Firefox dev.
Genuine question: what are they doing to alleviate the issues of Gecko rendering compared to Blink? As I understand it, most developers target Chrome, so they make it work with Blink, not Gecko.
Bugs are fixed where necessary, but I don't think they've stooped to implementing Chrome's bugs yet. Most of the work is social - reaching out to owners of websites which are broken in Firefox and asking them to fix them.
