In its current implementation the plugin finder just redirects to the gnash source at ftp.gnu.org (which is signed) or the mozplugger website.
This will be updated to provide a more useful response to the user, in particular it will try to provide a way to install the appropriate package from the repos of the distro the browser is running on.
That documentation is pretty old, I'll be updating it pretty soon.
Current .deb development packages can be tested from http://devel.trisquel.info/icecat/
The "toutatis" repo should work on Trisquel 6, Debian Stable and Ubuntu Precise, while the "belenos" one should work on Trisquel 7 (beta), Debian Testing and Ubuntu Trusty.
Main changes from the previous version focus on providing better privacy, in particular protecting the user against fingerprinting. The settings have been tweaked to prevent the browser from leaking information through referrers, cookies, useragent and other methods.
The current version comes with this main extensions enabled:
* LibreJS to check for the freedom of the javascript you run
* HTTPS-Everywhere redirects you to secure versions of the sites you browse
* A customized Adblockplus blocks known privacy trackers, and when in private browsing mode it blocks all third party content.
* A custom homepage lists this and other features with links to documentation and the possibility to disable them quickly if needed.
I'll be publishing a more complete list of features through the bug-gnuzilla mailing list soon, along with a beta release. Stay tuned!
This will be updated to provide a more useful response to the user, in particular it will try to provide a way to install the appropriate package from the repos of the distro the browser is running on.
The note about changing to http comes from the fact that the finder service doesn't work through https://gnuzilla.gnu.org/ but http://gnuzilla.gnu.org/plugins/PluginFinderService.php We would work on this too.