My experience with this extension has been uneven.

I was an early adopter of Workona and initially liked it. The design is intuitive, and dividing my work into separate work spaces helped me keep track of things. It really did change my workflow for the better.

However, recently it's been losing the data in my tabs. It can't load the tab info; the tabs itself remains, but the content is just "new tab" (i.e., open to whatever generic page Firefox opens to). This makes the whole concept pretty useless.

Their website doesn't provide any info on how to solve this.

I've since switched to something simpler that basically allows me to visually divide my work into sets of tabs (Tab Stash). While it doesn't have all the bells and whistles of Workona, that doesn't matter. I just want a way to keep groups of tabs visually/conceptually organized.