I am trying to find out what happens when I log into a website, using Firefox Web Developer Tools. One of the steps that happen automatially is a POST form submission:
<form name="login" [...] <input type="hidden" name="pm_fp" id="pm_fp" /> </form>
Web Developer Tools tells me that there is an actual value submitted for pm_fp,
pm_pf: "version[...]"
I’m not very experienced with web development, but I assume this would be populated programmatically by some javascript somewhere. The form seems to be submitted by
<body onload="get_deviceprint(); document.login.submit();">
I searched for these functions with Cntrl+Shift+F in the Debugger to add a breakpoint, but no luck.
How can I find out what is populating the pm_fp value? I’d like as specific instructions as possible, since I have limited experience with web development and Web Developer Tools.