[nfbcs] Inquiry about Firefox Developer Tool

[JooYoung Seo]

  Hello,
  I am JooYoung Seo, studying Learning, Design, and Technology at Penn
State graduate school.
  I am currently working at accessibility team, and sometimes asked to
use developer tool.
  As you know, sighted people just right click on the element they
want to inspect, and they can see the source code of that element in
the other pane.
  What I wonder is how to use the Firefox developer tools using JAWS.
  Let me give an example, if virtual cursor is on IMG tag that doesn't
contain alt attribute, and I want to play around with that element by
adding a new attribute and/or value, how can I open a source code that
takes me to that specific spot for the element?
  Or, what if I want to change CSS for a certain element my virtual
cursor is on?
  Can anybody guide me how to access a series of those works using
Firefox developer tools?
  Thank you so much in advance.
  Best Wishes,

       JooYoung