https://bugzilla.mozilla.org/show_bug.cgi?id=1542189
https://connect.mozilla.org/t5/ideas/shortcut-for-different-...
Even if it's a highly requested feature, minimal effort, high impact, and something users expect to Just Work™, just like it does in Chrome; it's still getting ignored.
And all they have to do is copy what Chrome does 100% exactly the same, no effort to design something new. They have all the functionality already in place, under about:profiles, it just needs a nice UI on top, and to open new links in the "last active profile".
When a user sees this does not work like it does in Chrome, and they have to struggle to achieve the same functionality with a worse workflow and a hideous UI, they will simply claim the functionality does not exist and carry on with their life using Chrome. They will not bother to search and install the extension that does this for them, that's simply not a realistic expectation to have.
I can work around this because I appreciate the other things Firefox has more than the effort I put into profile management. But I'm tech, and highly tolerant of things like this. Normal users aren't, the simplest inconvenience will throw them off for good.
If something Just Work™ in Chrome then it has to Just Work™ in Firefox as well.
This was just one example, probably the most obvious example of them all.