@dannyswift Chrome should automatically hibernate extensions if they're not in use, except for "persistent" background extensions. As for your request, you can set this behaviour yourself: Go to vivaldi://extensions Find an extension you want to limit to work on click only click "details" Scroll until you find the "Site access" choice: Set it to "on click" Then, that extension will only activate when you click it's button.

@audghk0010 Ah, fine Windows' Wuickstart can cause starting issues and on modern hardware it is not needed as the SSD or HD are very fast after boot.

@LonM Ayyy, thank you very much! Works as I envisioned! I doubt it's the very best way to do it, but if anyone is interested in a simple auto-hibernation for new background tabs, here's what I got in background.js: chrome.tabs.onUpdated.addListener(function (tabId,info,tab) { if (!(/"read":true/.test(tab.extData))&&tab.title!=""&&!(/^http/.test(tab.title))) chrome.tabs.query({active: true, currentWindow: true},function(tabs) { if(tabs[0].id!=tabId) chrome.tabs.discard(tabId); }); }); Interestingly, tab.url is always present, but if you hibernate the tab right away, it will stay empty on wakeup, so I check the title instead, and to make it more user-friendly, wait for it to display the actual title of the page, not just url, as it does at first. :3 Thanks again! Edit, right away: There still seems to be a window of time when the page becomes unresponsive, so it will need more work. If you can read this, I still wasn't motivated enough to fix it

Just for google or forum researchers/newbies I found how to achieve this in present Vivaldi with slightly more job to do. Click the tab furthest on the left. Then press (and hold) >shift< key on keyboard. Then click tab furthest on the right. Release shift. Right click on any of the tabs -> choose option hibernate >x tabs< where x is the number of cards selected. Done BTW This option is limited in usability because it does not allows to >unhibernate< whole window in the same way you hibernate it. So it is still feature request. It is why the simplest solution to my problem was just to buy additional 16 GB of RAM and/or unfortunately use (time consuming) saving and opening sessions more extensively.

@bugmenot3 I also need these feature. I've been using The Great Suspender, but I still find Vivaldi burning up too much memory. I've only got three windows open, with 10 pinned tabs and about 75 unpinned tabs, but Windows was complaining a short while ago that it needed to close Vivaldi processes because of low memory. I haven't used tab hibernation because it required manual intervention and doesn't allow keeping recently used tabs active. IOW, if I am actively using several tabs, I'd have to hibernate all but the current tab, then reactivate the other tabs I was actively using, just to get the rest to hibernate. What's more, the set of tabs currently in use can shift throughout the day, so manually hibernating tabs is terribly awkward. The value of The Great Suspender is that it suspends tabs automatically if I haven't used them in a configurable period of time. I don't have to think about it. Sure, there's a delay when I switch to a suspended tab while it reloads, but that's the cost of keeping the tab open and available, while trying to keep memory usage under control. The downside of The Great Suspender is that it adds to the memory used by each Vivaldi process, so I don't even know if I'm getting a benefit from its use. (I'll have to disable it and monitor things for a while.) Obviously, automatic hibernation in Vivaldi would solve these problems.

That would be a great solution to the memory hungry Vivaldi.

@jumpsq You mean this? (Currently, we need an addon to do that)

@dannyswift Please vote for the existing request: Speed Dial Open All in Tiled Tab Stack If you use sessions, they can include tab-stacks and/or tiled tab groups. You will still have to right-click to hibernate the tab stack

@dude99 Not default at default but it should be an option to switch on this behavior as default in Vivaldi Settings for those who have limited hardware resources or just use browser such it is prefered behavior. I personaly prefer loading pages at startup because I have powerful hardware and don't want waste my time on waiting pages to load after clicking on them.

Maybe integrate this in a 2-step-option: Do not auto-load hybernated tabs without explicit refresh Skip hybernated tabs on cycling (step 1 must be active to enable) to still allow predictable fixed scroll distance when cycling between tabs.

I know this is an old topic, but it has not been properly addressed. What the original poster is requesting is for: Tabs should automatically go into hibernated state after no use for a certain amount of time. For example, if I haven't viewed a tab for 10 minutes, it should automatically go into hibernation. The length of time should be configurable, as should a whitelist of urls to never hibernate. This is already implemented by a number of extensions (for example), but since Vivaldi already has manual hibernation, why not add automatic hibernation?