- Better fingerprinting resistance (AFAIK Firefox is the only browser currently uplifting Tor features).
- Tab containers. They're still reliant on extensions, but get past that and they're incredibly handy, even if you don't care about privacy at all. Tab containers allow you to have multiple different sessions running at the same time without switching profiles, so you can be logged into sites with multiple accounts at the same time. If you've ever used private browsing just so you can log into something twice, tab containers let you do that faster and more flexibly.
- Built-in screenshots. Yes, your OS already has this, but Firefox's screenshot tool is integrated into the DOM, so it lets you select a DOM container to screenshot, or screenshot the entire page, even if it's not all visible. It's a tiny feature that I regularly use, and I appreciate not needing to install another extension to get it.
- Better SVG performance. There are some parts of the browser rendering process that Firefox just does better than Chrome. There are some things it does worse, but my (subjective) experience has been Firefox is usually faster than Chrome at non-JS heavy tasks like browser repaints. Chrome is investing heavily into JS right now, Firefox is investing heavily into repaint/CSS performance.
- Keeping with that theme, Firefox dev tools have a bit of an edge when it comes to HTML/CSS editing (better rulers, font selection, Flexbox/Grid editing, stuff like that). Chrome dev tools are still better if you're doing heavy Javascript editing, but I prefer to debug CSS and do page layout in Firefox.
- Better defaults on small features like autoplay-blocking. Chrome allows videos on inter-site navigation to autoplay, Firefox doesn't. Chrome uses a behavioral algorithm to whitelist sites, Firefox doesn't. Just more sensible defaults in general. Chrome suffers from the same problem as a lot of Google products, where they're mostly sensible, but you'll occasionally run into really quirky design decisions that just seem like no one thought them through enough.
- I know you're not looking at the future, but it is almost certain that the Chrome Manifest V3 changes are going to go in for extensions in the near-ish future, and that happens Firefox will also be the best platform for Adblockers. I'm including that just because it's a relatively certain change that isn't very far off and that will have a very obvious effect on day-to-day browsing experience for a lot of people.
- Speaking of adblocking, if you're on Android, Firefox supports all of its desktop extensions, including ad blockers, which IMO is a killer feature -- extensions like UMatrix will save you a ton of mobile data. And if you're already using Firefox on Android, you might as well use it on the desktop as well so you can maintain the same extension-list or sync bookmarks between your devices.
- Better fingerprinting resistance (AFAIK Firefox is the only browser currently uplifting Tor features).
- Tab containers. They're still reliant on extensions, but get past that and they're incredibly handy, even if you don't care about privacy at all. Tab containers allow you to have multiple different sessions running at the same time without switching profiles, so you can be logged into sites with multiple accounts at the same time. If you've ever used private browsing just so you can log into something twice, tab containers let you do that faster and more flexibly.
- Built-in screenshots. Yes, your OS already has this, but Firefox's screenshot tool is integrated into the DOM, so it lets you select a DOM container to screenshot, or screenshot the entire page, even if it's not all visible. It's a tiny feature that I regularly use, and I appreciate not needing to install another extension to get it.
- Better SVG performance. There are some parts of the browser rendering process that Firefox just does better than Chrome. There are some things it does worse, but my (subjective) experience has been Firefox is usually faster than Chrome at non-JS heavy tasks like browser repaints. Chrome is investing heavily into JS right now, Firefox is investing heavily into repaint/CSS performance.
- Keeping with that theme, Firefox dev tools have a bit of an edge when it comes to HTML/CSS editing (better rulers, font selection, Flexbox/Grid editing, stuff like that). Chrome dev tools are still better if you're doing heavy Javascript editing, but I prefer to debug CSS and do page layout in Firefox.
- Better defaults on small features like autoplay-blocking. Chrome allows videos on inter-site navigation to autoplay, Firefox doesn't. Chrome uses a behavioral algorithm to whitelist sites, Firefox doesn't. Just more sensible defaults in general. Chrome suffers from the same problem as a lot of Google products, where they're mostly sensible, but you'll occasionally run into really quirky design decisions that just seem like no one thought them through enough.
- I know you're not looking at the future, but it is almost certain that the Chrome Manifest V3 changes are going to go in for extensions in the near-ish future, and that happens Firefox will also be the best platform for Adblockers. I'm including that just because it's a relatively certain change that isn't very far off and that will have a very obvious effect on day-to-day browsing experience for a lot of people.
- Speaking of adblocking, if you're on Android, Firefox supports all of its desktop extensions, including ad blockers, which IMO is a killer feature -- extensions like UMatrix will save you a ton of mobile data. And if you're already using Firefox on Android, you might as well use it on the desktop as well so you can maintain the same extension-list or sync bookmarks between your devices.