I just used firebug to alter the page in my browser. I changed the first heading from "This page exists only if someone is looking at it" to "What happens if I use Firebug to alter this page in-situ. Do I end up with malware?".
Will this change propagate? Has anyone yet seen this modified page in their own browser?
Edit:
From the original page: "The server double checks the hash of the content it gets and then passes it along to the new person." I guess the answer is that the change won't propagate?
Correct, the change won't propagate for the reasons you say. (See source [0]). Also, though, note that the content comes to you as a blob of JSON, which gets rendered into your page, and you respond to future content requests with that blob of JSON, rather than the HTML itself.
Will this change propagate? Has anyone yet seen this modified page in their own browser?
Edit:
From the original page: "The server double checks the hash of the content it gets and then passes it along to the new person." I guess the answer is that the change won't propagate?