Firefox add-on with keyword - windows

Tabby helps you manage a lot of windows and tabs easily; it can help you open, close, move, pin, and do many other things on tabs and windows quickly. With Tabby, you can even save all you windows and tabs for later with just one click!

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Merges the tabs from multiple windows together into one window. Extension won't show context menu item when there aren't more than one window of the same type to merge together. Private windows will only merge with private windows not normal.

Sign in to supported websites with accounts on Windows 10. Ported from the Chrome's Windows 10 Accounts extension.

Save and restore the state of windows and tabs. It also supports automatic saving and cloud sync.

Label your windows and profiles using custom window titles.

Windows XP Luna Theme for Firefox

Private windows are now purple. When you open a new private window, the appearance of the other windows changes, so in the extension settings, select the theme you are using.

windows 7 basic theme

Move tab to standalone window, without tabs bar, navigation bar and bookmark bar UI.

Easily set the layout (size & position) of your browser window

The Windows 10 default blue theme.

For those who miss 2007!

Click to merge all currently opened windows into single one

A theme to match Window's default blue color scheme.

Classic Windows color theme for Firefox (blue title line, white background, black text)

Minimalist browser extension to dynamically theme new windows (very cute). Use to differentiate open windows *or for the aesthetic ☆ ～('▽^人) *.

This was an attempt at recreating the default Windows 10 Firefox theme. I'm not a Windows user, but I love the default theme Firefox has on Windows, and couldn't find a replacement for it online. So, I made one myself. :)

Open your Microsoft Visio files for free

Resize the browser window. The resolution list supports customization.

A theme based on the Windows 10 default color option: Mint Light

Quickly resize the window to one of your favorite sizes

Very old Windows color theme.

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Merge specified browser windows into each other. Or all of them into one. Simply right click to open Firefox’s context menu when multiple windows are open, or configure a keyboard shortcut. All wrapped up in one tiny free extension.