I only use firefox because of it's multi-account container capabilities and some other better privacy features, which is more to do with it's wrapper vs. it's actual engine. Someone could make multi-account containers or better with chromium, and if they did I would just use that instead.
Otherwise firefox is a slower, less secure browser and an older more crufty codebase and less webdevs test it thoroughly. Why would I choose it as a new browser wrapper developer ever?
>Otherwise firefox is a slower, less secure browser
I'd like to see citations on that - AFAIK (my opinion is as baseless as yours) FF is plenty fast on desktop, and there is nothing inherently less secure about it than Chrome.
I do use Vivaldi (based on Chromium) on Android, but I consider Firefox Mobile and Desktop to be separate products.
Empirically, Firefox falls more easily than Chrome at Pwn2Own, and the exploit chains don't need to be very long.
Good news is, there is research that finds the Rust components of Firefox have much less memory safety bugs. Bad news, moco is not investing in Rust very much at all, anymore.
On perf metrics (artificial and specific websites) firefox is consistently slower than chrome and safari. It's improved a lot and on a good desktop, it's probably 'good enough', why would I not choose the faster one when I'm starting a new project when all other things being are equal?
Using those containers might be making your firefox experience slower. The very reason you use it might make you think you shouldn't use it for anything else. If you used it without containers I wonder if you would think it's faster. Each container has it's own resources.
How can it be less secure and the browser you choose for privacy reasons only?
Multi-account containers are separated cookie/state jars that auto spawn on tabs based on URL rules , they don't need a lot of resources other than maybe kilobytes or a few MB of extra memory per account container. CPU wise and overall memory wise it isn't much.
I would say it means that obviously Google wants to track all your personal info but they work really hard and expend a lot resources to be sure it's safe from everyone else, also some attacks are done to not get your info but just to wreck stuff.
Otherwise firefox is a slower, less secure browser and an older more crufty codebase and less webdevs test it thoroughly. Why would I choose it as a new browser wrapper developer ever?