Firefox 'solves' this by only loading tabs that have been given the focus upon auto-restart.
So, if you have 10 tabs opened, and your computer restarts and Firefox is opened, the only tab that will actually load is the one that was last active.
So, if you have 10 tabs opened, and your computer restarts and Firefox is opened, the only tab that will actually load is the one that was last active.
I notice I have to wait a second or two when I switch to another tab. This is annoying because I remember seeing the page load before I restarted. My subconscious doesn't realize that it was a different process.
I'd rather my browser and everything else involved work a little harder to give me the illusion that nothing has changed after I restart.
To always load all tabs after (re)start, go to Preferences > Tabs and uncheck "Don't load tabs until selected". ("Preferences" may be called Options or something on Windows or Linux, I can't recall right now.)
I would argue this is a sane default setting (it trades some waiting time when switching to a different tab for snappier start-up). Regardless, Firefox gives you the option to choose your behavior, which I would argue is the non-lazy thing to do (however simple).
† Note I am on Nightly, so it's possible this preference is not yet visible in the release version. It probably is, but just to be clear.
Also frequently FireFox crashes for me are due to it hitting the 4GB memory limit (well closer to 2GB obviously), so restoring all tabs would just result in Firefox crashing again. Restoring them piece meal lets me close down ones I do not need, thus allowing me to get FF's memory usage down to acceptable size.
One guy in that bug even wrote he patched that part out, but that's not a solution for me, I don't have time to compile Chronium myself.
Turning off wifi or configuring (in IE!) a fake proxy is the only remedy.
So, Firefox opens tabs or tab (as in juts one tab or many/all tabs)?
Because in my case it opens all the tabs and if there were 20, it opens all. Even though the last time I opened them was 3-4 hours before the browser was closed/crashed.
update: I had missed the point. Thanks @thirtian for clearing up.
Also, pinned tabs are always loaded at startup.