Numbered by when they opened
Window 1, Window 2, Window 3 - in the order you opened them, so moving tabs around never renames a window under you.
Work in one window, research in another, and two more you have forgotten about. Latr draws every open browser window as a column, so you can move tabs between windows, merge two windows into one, and save the ones you want back later.
The problem
Windows multiply quietly. A link opens one, a drag tears off another, a restore brings back a third. Each one hides the others, so the only way to see what is open is to switch between them one at a time - and the tab you want to move is never in the window you are looking at.
The browser gives you one window's tab strip at a time. A window manager gives you all of them together, so organising your browser windows is a matter of moving things on one screen rather than switching between them. Try it on the windows playground first - drag a tab from one window to another without installing anything.
The board
The Windows and tabs page draws each open window as a column of its tabs, side by side. It is the same list the tab manager is built on, laid out so the windows themselves are visible.
Window 1, Window 2, Window 3 - in the order you opened them, so moving tabs around never renames a window under you.
A page open in two windows is marked with the word, so you can see which copy to drop. Each window's menu can close its duplicates in one press.
When you know what you want but not where it is, search open tabs across every window and jump to it.
How to
Drag when you have a mouse in your hand; use the menus when you do not. Each move goes to the place you drop it.
Pick it up from one column and drop it in another, at the position you want. Drop it on New window and it gets a window of its own - moving a tab into a new window is the same gesture.
Press Select tabs, tick tabs from any windows, and choose a destination from Move to. The same bar can group them, set a time on them, or keep them in your library and close them.
On the window you want gone, open its menu and choose Merge into. Every tab moves to the window you pick and the empty one closes.
Every tab has a Move to list naming each open window and New window, and every drag on the board has a route like it - so you can arrange tabs between windows with the keyboard alone.
Per window
A window is usually a task - work, a trip you are planning, a bit of research - so each window's menu acts on that window alone.
Tidy the window
While it is open
Group its tabs by site or by kind, collapse, expand or ungroup its tab groups, close its duplicates, put the whole window to sleep to free its memory, or close it. Need two of its pages on screen together? Tick them and put the two tabs side by side.
Keep the window
For later
Save this window keeps its tabs and its tab groups, and naming it keeps it for good. Close your personal window at nine, your work window at six, and open either one again whole - or set it to come back at a time. The session manager has the rest.
To save browser windows automatically, there is autosave (your current window every 15, 30 or 60 minutes, keeping the last few), saving each window of two or more tabs as it closes, and a Wrap up the day command that saves every window and closes them all. All three are off until you switch them on. What Latr does not do is split one window down the middle or arrange windows on your screen for you - the one exception is putting tabs side by side, which fills the screen between them.
Questions
Open the menu on the window you want to empty and choose Merge into, then pick the window it should join. Every tab moves across and the emptied window closes, because a window with no tabs is no window at all. To combine several Chrome windows, repeat it until one is left - each merge is one choice from a list.
Yes. Press Select tabs, tick the ones you want - from any window - and pick a destination from Move to: another open window, or New window. That is also how you split a crowded window in two: tick the tabs that belong elsewhere and send them to a new window.
Yes. Every drag on the board has a menu route: each tab’s menu has a Move to list naming every other open window plus New window, and each window’s menu has Merge into. Tab to the control, open it with Enter and choose with the arrow keys. In the Open tabs list inside Latr’s popup, a tab’s menu offers the same move.
Yes. Saving a window keeps its tabs and its tab groups - names, colours and which ones were collapsed - and restoring it opens a new window and rebuilds the groups. Give a saved window a name and it is kept for good, outside the automatic rotation.
There are three ways. Two are settings, off until you turn them on: autosave keeps a copy of your current window every 15, 30 or 60 minutes and skips the save when nothing has changed, and save windows as they close keeps any window of two or more tabs that you close. The third you use when you want it: Wrap up the day saves every window and closes them all, for the end of a working day.
Yes. The windows playground on this site draws three windows the way they pile up over a week. Drag tabs between them, merge two and save one - it is a simulation, so nothing on your computer is read.
It does, to draw your windows at all, and that is why Latr asks for it the first time you open the board rather than at install - the install dialog shows no warnings. Decline and nothing else in Latr changes. It works in Chrome, Edge and Firefox, and a free install makes no network requests.
Free, no account, and nothing leaves your device. About ten seconds to install, and one keystroke to use.
Also on Brave, Vivaldi, Arc and Opera - straight from the Chrome Web Store listing.