Unlimited weeks in Google Calendar

A Chrome extension to show more than 4 weeks in Google Calendar.

Adds + and - buttons to display as many weeks as your screen can handle.

How this extension works:

wait for the toolbar to be visible
add 2 extra buttons to it
restore the main calendar's number of weeks, if custom view is active
these new buttons adjust the number of weeks:
- ensure custom view is active
- using the navigation calendar, do a double manoeuvre:
  - click next month repeatedly during a click drag over the mini calendar
  - this is how we reach more than one month
- ensure the calendar is still on the original start date
use browser storage to persist the number of weeks selected