Rtube is NOT based on Firefox, but both applications are based on the Mozilla-XUL framwork.
Rtube does not remove DRM(Digital Rights Management) removing DRM would be illegal against DMCA(Digital Millennium Copyright Act) and EUCD(European Copyright Directive) laws.
Rtube does not send any search-query's to the Rsolution servers.
When running Rtube the only information that is send to Rsolution is the login: username, password, RtubeVersion, timestamp of request
Rtube does NOT contain anything harmfull for your computer.
Rtube uses a unique client crawling system, it uses less resources and bandwidth than visiting the normal online-video site. images, banners and subframes are not loaded when searching.