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> The way I consume HN is I load up HN once or twice a day, open up all the interesting links and their comment pages in new tabs, and then go back to work.

By that time most pages are probably updated, so you wouldn’t get any 304s anyway.

Since recent update, Firefox behavior is to only reload restored tabs on demand. This avoids that issue.

https://blog.mozilla.org/blog/2012/06/05/firefox-has-a-redes...

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> By that time most pages are probably updated, so you wouldn’t get any 304s anyway.

Actually, quite the opposite. HN comment pages seem to peter out at about 12 hours in most cases, and after that you'll rarely see a new comment, so really the content stops changing after about a day.

The behaviour has been built in and accessible since Firefox 4 (initially through about:config, later through the Preferences), but has only been enabled by default later on. I've personally been using it since it appeared, and it's great if you literally have hundreds of tabs open, or use tabs as temporary bookmarks.

For pinned/app tabs, it can be enabled by setting browser.sessionstore.restore_pinned_tabs_on_demand preference to true in about:config.

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