Simple, fast, provides exactly the functionality needed, and so easy: just right-click to get the tab context menu and click on the Merge all windows option. Thank you!

Please give usage instructions in the description.
e.g. Merge Windows is in the right click menu

MW works.

Excellent!
It simply works!
And is fast! :-D

Really not too much intuitive for first-time use.
A more clear one-line instruction about the 'right-click' way would be useful.

Absolutely amazing idea, I love it!

Simple and work as aspect.

Very useful addon, thank you! Have you considered making a version or implementing a setting that would always merge all windows automatically should they be opened? That the only thing this addon's missing to be perfect.

Nice addon. Does what it says

super useful feature

Simple and easy to use.

Can't fault it.

good