I try every new firefox release for at least a week, and to be honest I haven't seen an advantage of using it since chrome came out.

It is just way too slow[1], it may have better extensions better adblocking and a regular ui but it just can't compete.

[1] Slow in both snappiness and perceived rendering compared to chrome, firefox also still likes to crash or freeze on me which rarely happens with chrome even though I run the dev channel.