I don't use Firefox as my primary browser, but I do use the desktop version of it on various computers numerous times per week as part of some work I do.
I find Firefox to be noticeably slower than the various Blink-based browsers and Safari (when available) when running on the same systems. I'm referring to the overall responsiveness of the UI and the application itself, as well as the rendering of sites, and the subsequent interaction with them. I find this to be the case for a fresh installation with no extensions, all the way through to an installation with common ad blocker extensions installed. Firefox is just plain slower, from what I can tell.
Firefox's extension signing nonsense is another pain point. As part of my work, there's a fully-trusted custom extension developed in-house that I need to install. It's trivial to install in the various Blink-based browsers. On the stable releases of Firefox, though, I have to jump through numerous hoop to get it installed and usable, and this has to be done each time the browser restarts, which is often in my case.
I find Firefox to be noticeably slower than the various Blink-based browsers and Safari (when available) when running on the same systems. I'm referring to the overall responsiveness of the UI and the application itself, as well as the rendering of sites, and the subsequent interaction with them. I find this to be the case for a fresh installation with no extensions, all the way through to an installation with common ad blocker extensions installed. Firefox is just plain slower, from what I can tell.
Firefox's extension signing nonsense is another pain point. As part of my work, there's a fully-trusted custom extension developed in-house that I need to install. It's trivial to install in the various Blink-based browsers. On the stable releases of Firefox, though, I have to jump through numerous hoop to get it installed and usable, and this has to be done each time the browser restarts, which is often in my case.