[markussss]

I have not found any shortcomings in Firefox for web development, so I'm wondering if you could you elaborate on what features are missing, or what killer features for web development Chrome has that Firefox doesn't?

[zmxz]

Development console in Firefox is lacking compared to Chrome's. Also, the whole Firefox browser is massively slower. There have been benchmarks that prove what I'm typing here, I can't give you a definite list and I see that people started jumping on the downvote hammer so I'm not inclined to defend my opinion. It's my experience, and if someone else's experience differs - I'm glad for them.

[jakear]

The entire local file system api, for one: https://developer.mozilla.org/en-US/docs/Web/API/File_System... , which severely neuters any tooling designed to help you do real work on your own files.

[ajvs]

Also a massive vulnerability surface letting arbitrary websites write whatever they want to your disk.