How to recover form information for a webpage in Firefox
I typed a couple of paragraphs on a discussion board, but when I clicked the submit button, the site was undergoing (un)scheduled maintenance, and the back button decided to refresh the page, sending my paragraphs into oblivion.
A quick web search revealed that Lazarus provides form recovery for Firefox. However, installing a plugin requires restarting Firefox, and even after restarting Firefox (which I haven't done yet), Lazarus can't recover forms it hasn't backed up yet.
Now that the horse is out of the barn, I want to do the impossible: restore some or all of the text I typed, without restarting my browser.
Edit: I should clarify. Lazarus is a wonderful solution for preventing future form data loss. This question is for people who have already navigated away from their form and lost its contents, but hope there is some way to salvage the situation. My solution was to get a core dump of the process and grep through it, but there might be a layman's way to do it (for example, somehow get Firefox to load the cached version of the previous page). Thus, solutions that only solve the problem in the future, without addressing the present, are off-topic in this question.