Install Lumno
Lumno is free, requires no sign-up, and is ready to use as soon as you install it.
Install from a store
| Browser | Install from |
|---|---|
Chrome, Dia, Brave,  Arc, Vivaldi, Opera |
 Chrome Web Store |
| Microsoft Edge |  Microsoft Edge Add-ons |
Firefox,  Zen, LibreWolf, Floorp |
 Firefox Add-ons |
Open the store page, click "Add to Chrome", "Get" or "Add to Firefox", then confirm in the dialog that appears. Edge users can also install Lumno from the Chrome Web Store.
After you install
Your browser opens Lumno's welcome page, which introduces the main features.
The first time you open a new tab, Chrome may ask whether to keep the new tab page changed by the extension. Choose to keep it. If you choose to change it back, Chrome turns off Lumno entirely, including the command bar. To keep using another new tab extension, see 
Use another new tab extension.
Try the command bar
Open any page and press ⌘Ctrl⇧ShiftK to open the command bar. Type a few letters to search your open tabs and bookmarks, then press Esc to close it. In Firefox, the default shortcut is ⌃⇧KAltK.
If nothing happens, see the troubleshooting steps in Keyboard shortcuts.
Use it in local files
To open the command bar in PDF or HTML files on your computer, go to chrome://extensions, open Lumno's details page, turn on "Allow access to file URLs", then reload the file. Firefox doesn't let extensions access local files, so the Firefox version can't open the command bar there.
FAQ
Do I need an account?
No. Lumno has no account system, so you can start using it as soon as you install it.
How do I uninstall it?
Open chrome://extensions (edge://extensions in Edge), find Lumno and click Remove; in Firefox, remove it from about:addons. This deletes the settings and images Lumno stored on your device.