Copying Text from Web Message Box/pop-Up Window

If I “Inspect” a pop-up window/message box on chrome browser (by right clicking a web-page in chrome browser) there is a field called “Accessibility”.

Under “Accessibility”, there are “GenericContainer” which has “list”. this list has a number of names as values (e.g. different type of pen).

I would like to copy all values (names) of “list” and separate each value (names) by “;” when I click that pop-up/ message box using a Add-On in Chrome.

How can I make that...

Copying Text from Web Message Box/pop-Up Window

from JavaScript https://ift.tt/2L31Rle
via IFTTT