So, I was just in the middle of a programming test for a job application where I had to download an HTML page, edit the JavaScript to perform a desired task, and email it back. I downloaded the page, but the JavaScript had been replaced by the text, “Script removed by snapshot save”. Luckily the removed JS was only one line and I was able to figure out what it was.
Afterwards, I went searching for the cause and found this forum post, which explains that the problem is caused by the Mozilla Archive Format extension, which has a setting that even affects pages not saved as .maff. To fix the problem, go into the MAF extension settings and change “When saving complete web page contents:” from “Take a faithful snapshot of the page” to one of the other options.
Seán Hayes 