- download the files
- Press the green button with the text "code"
- In the new pop-up press on "Download ZIP"
- go to the new downloaded file
- should be in the downloads folder
- unzip the files
- rightclick and then in the menu unzip or something like that
- open a chromium browser
- press on the puzzlesymbol
- press on the gear symbol (bottom)
- activate in the top right corner the developnement enviroment
- from the 3 new options choose the left
- a folder appers
- travel to the folder that contains the add-on
- press continue/choose or something like that