For what it's worth, Firefox has been somewhat more stable for me than Chrome on Linux lately (there are other reasons to want the sandboxing, but stability is one of them). Now that Flash is so much less common than it was a few years ago, the instances where my browser dies due to a misbehaving plugin have dropped to almost none. Also, the only reason I ever start Chrome is to watch Netflix or other sites that won't work in Firefox (I still had to tweak the user agent to claim to be something different to convince Netflix to work); so it's possibly not surprising that it crashes more than Firefox.
It should be noted that while Firefox doesn't have tab sandboxing, it does isolate Flash (by launching it in a separate process called plugin-container).
Here's how firefox describes plugin-container [0]:
Plugins are loaded separately from Firefox, allowing the main Firefox process to stay open if a plugin crashes.
This is different than a sandbox. A sandbox limits what the plugin is capable of doing to the system. The whole point of sandboxing flash is that it has had numerous security holes.
Wow. When did Silverlight become available for Linux? I knew it was available for Android, Mac, and Windows. But, last time I looked it wasn't available for Linux. Which is why I've been using Chrome for Netflix, as it has HTML5 video DRM (I guess; I just followed instructions online months ago and it worked and I haven't changed it since).
But, I see that Microsoft does provide a download for Linux and FreeBSD and even Solaris! Oh, wait, it's a redirect to Moonlight. I didn't think it worked with Netflix, but if I find myself with some free time I might play with it.
And, of course, it's anecdotal.