In case you're mad at yourself for closing your precious window with all the right tabs opened, note that Firefox allows to reopen recently closed windows

How would people function without knowing this?? Maybe I'm just young, but this has been a thing as far back as I can remember (maybe 2010 or so), on all browsers I've used (Safari, Chrome, Firefox).
- yeah if I did ctrl-shift-T and didn't get my tab back on a modern browser I'd assume it was a bug lol
  
  This about reopening entire Windows that you closed, which you can undo since version 116, released August 1.
  The keyboard shortcut to reopen closed tabs (Ctrl + shift + t or Command + shift + t depending on your operating system) now reopens last closed tab or last closed window, in the order items were closed. If there aren't any tabs or windows to reopen, this command restores the previous session. This change is in anticipation of upcoming changes to recently closed tabs.
  
  Yeah! That still works for tabs it looks like, but you have to do Ctrl+shift+N to get closed windows back.
- ~~It got removed from chrome a while ago. Have to use an extension for it.~~
  
  What are you talking about? I used it like 2 days ago last time, no plugins. Not sure if there's a hotkey for reopening a closed window (ctrl shift T?), but you can find it from the menu in upper right corner of the browser.
  
  That's terrible. I'm so sorry.

Ctrl+Shift+T anywhere.
- Ctrl-Shift-T for the last tab closed, Ctrl-Shift-N for the last window closed
  
  Just checked, it appears ctrl+shit+T will also reopen a window if the last closed tab was on it.
- Just don't share computers, problem solved!

Command + Shift + T on mac os, and Ctrl + Shift + T for Windows
You're welcome
- Don't forget Ctrl + Shift + N
  
  Or Ctrl+Shift+P for Firefox
- That's last closed tab, not window.
  Edit: actually it will reopen a window too if the last closed tab was on it.
  
  I think that's a fairly recent change, I remember reading it in the changelogs. There was also something else relating to the feature, but now I don't remember

CTRL+SHFT+t
Will reopen your last closed tab.
- CTRL + SHIFT + n
  For a recently closed window.
- niceee!!
- Opens the terminal for me.

Literally every browser has this feature, it's not unique to Firefox.
- Firefox didn’t have it for the longest time so a lot of people don’t know
  
  So we're giving them props for something that's been available on chrome for a decade?

Shift+ctrl+T is usually the keyboard shortcut to bring back closed tabs Shift+ctrl+N is to bring back closed windows (doesn't work on private browsing windows)
- I've found that it does work in private sessions

I can still feel the pain when it’s 2 AM and you meant to Ctrl + Shift + T and you’re muscle memory leaks in and hits you with the Ctrl + Shift + W.
FYI there’s a confirm close option that will mitigate this terrible scenario, for anyone that’s been there before.
- Or just Ctrl+shift+N will reopen that window. It has been there for years, perhaps more than a decade, and is the perfect companion to Ctrl+N, just like Ctrl+shift+T is the perfect companion to Ctrl+T.

I have Ctrl + W and Crtl + Shift + T bound to my mouse for this reason.

You can just press CTRL+SHIFT+T and CTRL+SHIFT+N continually to reopen closed tabs and windows, respectively, in the order they were closed.

ctrl+shift+t

As someone who frequently has windows with 1000+ tabs, this feature has saved my bacon countless times.
- This makes me feel understood.
  Who needs bookmarks anyways :')

I highly recommend Tab Session Manager if you're a crazy person like me.
- seconded, it's great for resuming learning sessions and stuff like that.
  Being able to jump back into all the troubleshooting and stack overflow tabs whenever a problem reappears is great.
- thanks, didn't know this one but seems highly helpful
  
  Saved my ass many times.
- itsa great extension for people with internet problems

It also persists through a reboot, so if you shutdown or reboot with tabs open, it will ask you to restore the previous session when you next start it after the boot.
If you didn't restore it, but didn't open any more tabs, you can close it again, reboot, etc, and this option will still work to get your tabs back when you're ready.
- What about if it’s private browsing mode?
  
  They aren't recoverable after the session ends.

Oh yeah this feature is a godsend

Chrome crippling the reopen tab option(they removed from right click menu) is what drove me back to Firefox.
- I'm so sorry you had to use chrome, hope your day gets better.
- Not here to defend chrome, but Ctrl+Shift+T works on chrome as well still.
  
  I don't use keyboard shortcuts. And the right click menu only has like 5 things, and that was the option I used the most. It was a pointless change.
- Waht... I haven't used chrome in years. Unbelievable they'd remove that.

I rely on this all too often...

Only the last three or so windows though, so if you got a few pop-ups before you press that you might be screwed...
...unless you have backups of an old session file, then you can use this tool to restore a list of those tabs: https://www.jeffersonscher.com/ffu/scrounger.html
There is also this handy addon for saving backups of windows like that to a txt list of urls: https://addons.mozilla.org/en-GB/firefox/addon/urls-list/

How do you people make the screenshots of popups in Firefox? Every time I press Print Screen they just keep fading away.
- If you’re on windows use “snipping tool”
  
  I think it's ALT + SHIFT + S. That is one thing windows gets right. Though I believe they made a new version that is a bit worse for some reason beyond a this mortal's understanding.
- Ctrl+shift+S will do Firefox's screenshots. Windows key + shift + s is the windows snipping tool to take a screenshot of anything (aside from hdcp content like trying to screenshot a Netflix video that's copy protected).
- I'm using the app Screenshot with a delay on Gnome.

I wish Firefox had a method to restore windows after a restart. Losing all my tabs across multiple windows due to work required updates is a huge pain.
- This is literally a thing? You just go to options and tick General -> Startup -> Open previous windows and tabs. It is quite literally the first option in the interface. I only mean to be a slight bit rude, but did you not even take a cursory look through the options?
  
  Don't worry about being rude. Spreading demeaning misinformation about free software, especially one as important for the Web as Firefox, should be frowned upon.
  
  Personally, I'd like it to be able to do it sometimes without having to set it to happen every time. In other words, I'd like a "restore previous session" UI element in the history interface.
  I should probably look into some of the extensions folks in this thread are talking about.
- If you can use extensions, I use the Tab Session Manager extension. It has a ton of features too but the big one is auto saving your sessions so you can always restore it all after a restart.
- There is a "recently closed windows" section in the history area. You can get all your tabs back.
- It's funny, it does do this when Windows restarts outside of your control.
  But if you manually trigger a reboot, it assumes you closed all your windows intentionally.
  At least that's how it behaves for me
  
  Force kill it, lol
- Any idea why Brave does this by default? I didn't ask it to, but it always opens the ten or so tabs on restart
- I don't understand this thread, this is exactly what I'm talking about in my OP.

I know this, but I'm peeved that when I shut my computer off with Firefox open, I have a 50/50 chance of it automatically bringing all my tabs back on the next launch.

I also like that its PDF viewer opens exactly at where I left it at.

- I can only speak for myself, but it's often a kind of to-do list. The tabs stay open until I've completed the tasks.
- I am sorry to do this to you, but I have minimum of 30 tabs open at all times. Send help.
- I have at least one Firefox window open on each of about five workspaces, each with anothing up to twenty or thirty tabs open. It's not insanity at all, no way, not at all. What's that nurse? It's time for my dried frog pills? Well ok then.
- Currently have 5 windows open with 10-30 tabs each. Use them all everyday. Easier to keep tabs open then dig through bookmarks.
  That is the purpose of having tabs and multiple windows. They can sit unused until needed.
- Because I'm continuously using them when I work, it's emails, calendar and chat. They always stay there, the rest varies.

@OP When you have continue session on, closing Firefox using burger menu->Quit restores all windows. I assume this will also keep the pins even without continue session.

Good tip, though I have just hidden the close button with userChrome.css. It does not protect against alt+f4, though..

Saved my butt a few times already.

It works until Firefox applies updates and the next time you open it it automatically loads a "what's new in Firefox" tab erasing your previous session. Then you're SOL unless there's some way around that.
- After updates, mine always opens all of my tabs. Maybe check your settings.
  I've not started a fresh session of Firefox in years tbh. Not sure why it is different for you.
  For reference, holds true on my phone, desktop, sim desktop, programming laptop, hobby laptop, network testing laptop, media laptop, backup management laptop, steam deck, second steam deck, virtual red hat machine, virtual windows machine, and hackintosh. So, a wide variety of environments. Never experienced this issue.
  
  Same here (tabs always restored). I'll do an update with Firefox open; eventually it'll make me restart it, but always, tabs are there.
- You're being downvoted or something but it's same for me.
  I love Firefox but every time I update it there's this page with "Yay now you're safe because you updated" that randomly can open as a new tab in my existing session or as a new window with a single tab and erase my previous session. And I hate it. Like, this page doesn't give me any useful information, I never asked for it, I can't turn it off, and that's not all of the problem, even more, this stupid page loses my information and undoes my work of opening and arranging my tabs the way I like.

Even works with 200 tabs open.

I use this several times per day when I close the wrong tab (or window). :)

In my FF I have set the "reopen all tabs that were there when I closed" option, so it never has been a problem
- Does it work when you had two windows opened? Does it reopens both or only the last closed one?
  
  It reopens all tab in a window, I'll need to test with two windows !

Try T
You're welcome

Uh, you can also use these things called bookmarks to save commonly accessed webpages… also this is a feature of literally every web browser since checks notes forever.

- wat
- You mean "recent bookmarks"? Huh, never noticed that was there. I think it's probably locally stored and not really a thing websites can just access.
- Are you talking about them syncing to your Firefox account? Because you can turn that off or just not sign in.
- Do... What?
- @PeleSpirit @oce of course you can turn it off.
- ...but you can?
  Right click any bookmark under the hamburger menu, and select Delete Bookmark. It deletes. You can also delete all in the bookmark manager. But those seem like a non-issue, since they have to be manually created.
  Same thing works under History in the hamburger menu. Right-click any item in history and select Delete Page. It deletes. Same as above, all can be deleted in manager or by selecting Clear Recent History > Time Range to Clear = Everything.
  Firefox will not store history at all if you go to Settings > Privacy and Security > set "Firefox will" to "Never remember history".
  So..... ?
- Wait, what? You don't want them to save bookmarks? Then what is the use of a bookmark? And you can definitely set your browser to erase your history every time you close it.