same same, I recently bought a second-hand laptop for $150, an i5, came with 4 gigs and I bumped it up to 8 gigs and installed ubuntu, I use firefox. I noticed

same same, I recently bought a second-hand laptop for $150, an i5, came with 4 gigs and I bumped it up to 8 gigs and installed ubuntu, I use firefox. I noticed facebook, gmail and a few other sites really killed performance, the interface would freeze with high swap and cpu. I keep them closed now, I use session manager to start and stop sessions. I tried a tab suspender, it used to work fine but I'm not sure what happened to it, eventually it disappeared from firefox addons website and someone started a new project, but I got weird issues with other extensions like ublock origin crashing with the tab suspender running, whereas they are fine when the tab suspender is disabled. So, for now, I only start facebook and gmail when I'm using them and close them when I'm not. Edit: before firefox containers were a thing I had a profile for different tasks, one for facebook, one for google, etc, to try and limit tracking. I have no idea how effective that is, I'm thinking not very. But anyway, that's also a handy way to start and stop sessions. You have the setting to restore the previous session, and when you exit and start it up again, only the tab with focus gets loaded into memory, the other tabs load when you click them. So you can have 20 tabs opened and restarting the profile only loads one tab, then others load on demand.