Main project is a sinking ship (cf. % of usage), most of their big projects have failed and closed in the last years (mobile, email client, persona, etc), they are caught in a major rewrite of their main project that may never end. It's a matter of time they stop getting funded.

This is my opinion; it is what I believe will happen, based on past and current events. Of course I might be wrong, or not.

With all due respect, I don't think it would be fair to call the quantum project a rewrite. They're incrementally replacing components, and it's not like the original code is abandoned in favour of Servo. It's borne fruit already and looks to allow some massive improvements going forward. Chrome is big, but so was IE back in the day and I still use FF. Not because of a moral attachment, but because it's the browser I like using the most.

Not to mention Rust is already successful, with several large companies using it in production. I expect it will continue to garner interest, especially if the fearless concurrency model keeps improving. Zero cost futures are pretty amazing.

Two things:

1. the largest part of the work on the "major rewrite" - do you mean quantum or servo? If the former, most of the bits we really care about will get shipped on Nov. 14th, and some other things like webrender will get shipped over the winter.

If you mean servo, you're right, that is a longer-term strategic project, but has recently provide useful as a source for innovation in Gecko with things like stylo and webrender, and especially Rust's capabilities as a language.

2. Mozilla is self-funded and has a very different governance model than perhaps you're used to - we are a US Corp ( and subsidiaries ) owned entirely by a US-based Not-for-profit.

( to be 100% crystal clear, I do think we'll ship things that use servo down the road )