free JS for RSF.org petitions per NateN1222

Allows you to sign a RSF.org add-on without running non-free Javascript on Firefox with LibreJS enabled.

Note: since RSF.org has a blocked script for handling its navigation bar, to use this you need to obtain a direct link to the petition you want to sign.

Here is an example of the type of link that is fixed by this add-on:

https://rsf.org/en/freedom-cumhuriyet-freedom-all-turkish-journalists