pity this extension doesn't work with the "ColourfulTabs" etension. Rated 4 out of 5 stars

I love Hebrew Calendar and find it extremely useful. After installing ColourfulTabs and realizing it isn't working I disabled all extensions one at a time and realized it was Hebrew Calendar that was preventing ColourfulTabs from working.
Great pity - those are two great extensions which I sould love to use! Any chance of fixing it?

This review is for a previous version of the add-on (1.0.4.60).