How can I run a user script before any inline scripts run on a webpage?

Question

I want to make a greasemonkey type script for firefox that runs before the scripts on the page. Greasemonkey scripts run after scripts on the page, so that won\'t work. The re

Answer 1

[edit 2013] Use the page-mod module of the Add-on SDK with contentScriptWhen = start.

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older: Right, only newer Firefox builds (currently 3.7 nighlies, may later be added to 3.6.x) have support for running custom scripts before content-specified scripts. I wrote a prototype Jetpack-SDK module to take advantage of the new notification.

Is it a <script src> or an inline script? In the former case it can be blocked with a content policy (something adblock-like).