This is sort of tangential to coding, but programmers often do \"view source\" on their own pages and on others\' pages. I learned that when you do the normal View Source in
This is an older question but it still happens from time to time depending on what they have currently broken in the latest Firefox or what subtle extension bug is causing conflicts.
I wanted to post a workaround that seems to work for me consistently, because in the end we have to get work done and not spend hours trying to fix this.
Simply add view-source:
to the beginning of the url and it will show the source with the get/post data that you are trying to use.
ie.
view-source:http://stackoverflow.com/
Not a true solution but a work-around to get work done.