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Revision as of 03:18, 27 August 2009 by Marti (talk | contribs) (→‎Danger, danger... high voltage!: Reply for Aavindraa)
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We should add an example of an exploit. If not running code (would be nice) for security-by-obscurity reasons, then at least explain what could happen. -- 17:39, 13 April 2007 (EDT)

+1 . I've never totally understood *what* the vulnerabilities are. This is the most I've ever gotten: Arantius 12:17, 13 May 2007 (EDT)

How to do I use GM_setValue safely?

I want to insert in the page an HTML element that can be used to update a preference.

My strategy for doing this is:

  • add the element in the userScript, with an onclick property set to call updatePref(new_state);
  • add a function to update the setting to unsafeWindow, here is the function:
	unsafeWindow.updatePref = function(state) {
		var s;
		if (state) { s = true; } else { s = false; }
		GM_setValue('pref', s);


  • Is it safe?
  • Is there a better way that does not involve unsafeWindow?

You should be able to just define the method on window. So try just
function updatePref(state) {

-- 04:13, 6 May 2007 (EDT)

Asking questions should really be done on the mailing list not the wiki. Arantius 12:17, 13 May 2007 (EDT)

This page would be a zillion (conservative estimate) times more useful if it actually described why unsafeWindow is unsafe instead of asking us to take it on trust. I have attempted such an explanation, but it would benefit from checking by someone who knows more about it than I do, Dan 18:17, 5 September 2008 (EDT) Dan 08:02, 6 September 2008 (EDT)

@Photodeus Careful... this is part of the API and there will be consistency here... this isn't wikipedia's style. Marti 22:45, 28 April 2009 (EDT)

Danger, danger... high voltage!

Can we supply an example of HOW exactly unsafeWindow is unsafe? It reminds me of Statistics class. If your residual plot shows non-random scattering, "proceed with caution". And exactly what does proceeding with caution entail? QED. --aavindraa 02:18, 25 August 2009 (EDT)

Well you see... you stick the fork into the outlet and watch the pretty sparks fly! ;). As a general rule of thumb, in my circles, it's not a wise idea to teach someone to use kitchen utensils unwisely. ;) Marti 03:18, 27 August 2009 (EDT)