Greasemonkey: Unset a variable

Question

This is a question that has been plaguing me for awhile.

In Greasemonkey you can use GM_getValue(name) and GM_setValue(name, value) to store persistent variables. My question is, how do I 'unset' a variable?

Answer 1

Try unsetting it by setting it with a blank value:

GM_setValue(name, '')

If that doesn't work:

• Go to about:config
• Delete the entry
• Restart Firefox
• Run the script

Answer 2

GM_deleteValue will unset a value set by GM_setValue,
starting with Greasemonkey version 0.8.20090123 (February 18th, 2009).