Option for Custom duration.

[Tom-Binoy]

Is your feature request related to a problem? Please describe.
The problem is that I have to go to Firefox add-on settings every time I want to change the amount of time for break/ work.

Describe the solution you'd like
I want to add a button saying 'Custom' before 'Reset' or 'Tomato' buttons. When I press it, I should be able to pick the amount of time I want the timer to run. Including in hrs : mins : sec format.

Describe alternatives you've considered
Using a different Add-on.

Additional context
Add any other context or screenshots about the feature request here.

[ProgramminCat]

Hello there! Because of this repo's lack of activity, I've decided to fork this repo. In my fork, there is a way to switch between time presets, and soon, a way to add your own custom preset. My fork is over at https://github.com/ProgramminCat/tomato-clock-ng. Please check it out and hopefully it will help you.