I love this and often find I have a blank tab open just as clock. Only things that bother me:

-Wish there was a 'UTC' time-zone option. Now I can use a 'workaround' by looking for a GMT+0 timezone, but a simple 'UTC' option would be nice

- Frequent updates means I have to re-do all my clocks every month. Really wish there was an option where it would import my previous settings.

THE 3.0 Update was great, but why now its gone on firefox?

I rated it four stars because:
I am very satiesfied with all the new config options, using 3 Timezones and search and i always have the current time in the tab title, perfect so far.
But i am missing 2 options:
i would be glad if i can use european 24 hours time without am and pm.
and i am missing the option to export the settings.
Using CaretTab also with Cent Browser - based on Chrome - due to very special options what i can't get on other Browsers, i searched to import the settings....so i have to do the same config again..(
I don't use and dislike Twitter or FB so i have to make my suggestions here.

Love this, any chance of adding local weather to this? Would be nice to have the world clocks along with local weather (with maybe the forcast).

Cool clock. I turn it on occasionally if I want to step away from my computer and want a nice screensaver clock. Other than that, I don't really need it (since I have my computer clock displayed on the lower right corner). I accidentally stumbled on it while looking for a good alarm clock. I'm keeping it for now, to see if the developer might add an alarm feature soon... When the developer adds an alarm feature, I'll give this 5 stars!

OMG I LOVE THIS EXTENSION! There is so much to be customized. Amazing the only reason I'm giving it four is because it doesn't open up directly from my desktop, and only pops up when I open up a new tab in Firefox. Other than that, great job! Also, I think it would be cool to customize the background with a photo and/or video.

it works for Chrome-based Edge. But in Firefox, it's just a blank page without any element.

Beautiful looking, myriads of customization options.
However, the links are not working on Firefox 47.