Fixed mistakes in my previous pull request.
Added a storage logic, themes are now stored on a json file.
Changed the plugin methodology for future updates (if it's not pratical I will revert it).
Made the active theme load faster (no more weird black screens when page is loading).
Added a "error message" when the popup opens outside a pinterest page or when the themes fail to load.
Separated manifest files for Chrome and Mozilla (don't forget to change the file name when updating the plugin).
Fixed mistakes in my previous pull request. Added a storage logic, themes are now stored on a json file. Changed the plugin methodology for future updates (if it's not pratical I will revert it). Made the active theme load faster (no more weird black screens when page is loading). Added a "error message" when the popup opens outside a pinterest page or when the themes fail to load. Separated manifest files for Chrome and Mozilla (don't forget to change the file name when updating the plugin).