KanbanTab is a useful Firefox add-on for managing workflows. Its user interface is simple and easy to use.

A suggestion: KanbanTab should have more colors. 32 colors may strike a balance between variety and simplicity.

Would be a great extension but it keeps setting itself as my default tab but I don't want it to be my default tab. I have this pinned and my default tab should be something else. Whenever I change it will change itself back. So-so annoying! How can I turn this off???

UPDATE:

I had emailed the developer and got this response:

"Sadly this is a thing in Chrome as well, because there is no way for either me or you to change which extension will be the one to open in the new tab-page.
There is one workaround only that I've come across and that is to install KanbanTab first, and then your other extension afterwards. The way it works is that the last installed extension that "overwrites" the new tab-page will be the extension that shows up.

I hope the solution works for now, I've been looking for a proper way to handle this for sooooo long."

Tested and it worked so changing my rating. :)

Well done! Great service!

A very useful tool that I have not found elsewhere. Safe to use and fast!

Have tested several offline Kanban tools and this one has made the race :)
Good usability, items clearly arranged (and customisable for fine tuning column widths and gaps and even more...)
very useful and practicable, thanks!

excellente extension. mini kanban bien utile ! merci l auteur :-)