No edit icon for file of forked GitHub project on Chrome Browser

I am trying to add some details to the forked project and so i like to pull it to the main project i am searching the edit icon on ht page of GitHub project and i have seen this instruction but i can not found the edit icon via that page.

Now can not see any edit icon via the GitHub page, the page is like this:

enter image description here

So i want to know it is possible by GitHub page via chrome browser to do it or it must be done by command like git clone <Project-url> and others git commands?

Thanks.