Comment by wodenokoto

A very long time ago, Mozilla decided it was too difficult to keep Firefox’s engine API stable and said it’s more important that we have developer velocity than we have other people releasing software based on our rendering engine.

A decade or so later they kinda backtracked on that stance with boot to gecko and FirefoxOS but it is my understanding that they never took that momentum to make gecko into something that can be used for electron like platforms or indeed a new browser.

Bottom line is that WebKit/blink gives you better website compatibility (because major parts of the web is only tested against chrome) and is easier to use as a library than trying to wrap something around Gecko.

I think this has been one of Mozilla’s worst decisions.