You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser.
macrumors 65816
Original poster
The uploads symbol on a MBP, the square with the arrow pointing upwards, like this,
, can you add a website of your choice to it?
It's actually called the
Share button. I think only OS X extensions can add things to the Share menu.