Firefox name. Further messages from Mike Connor clarified Mozilla's new trademark policies: usage of the Firefox name is not allowed unless the rest of the branding is used and all of the browser's changes are approved by Mozilla Corporation. As Debian releases are frozen on a long-term basis, software in the frozen stable releases needs to be patched for any newly discovered security issue. Under the revised guidelines, in order to use the Firefox name, approval from the Mozilla Corporation would have been required for all security patches, but the Debian project felt it could not put its security in the hands of an external corporation in that manner. The "Iceweasel" name was revived in the Debian community as a possible name to give the rebranded version of Firefox. The Iceweasel found in Debian is not GNU IceWeasel (now GNU IceCat), but rather a rebranded Firefox created by the Debian project. The Debian maintainer has stated that he will "get in touch with [the GNU IceCat/IceWeasel team] to see what we can do together". Similarly, Debian renamed Mozilla Thunderbird and SeaMonkey to Icedove and Iceape, respectively. Rebranding According to the Debian Package Tracking System, Iceweasel, Icedove, and Iceape were first accepted into the Debian project's unstable repository on November 20, 2006, on October 14, 2006, and on December 1, 2006, respectively. Icedove migrated to Etch and Thunderbird was removed on November 11, 2006. Iceape migrated to Etch on January 11, 2007 (the old Mozilla suite having previously been removed on October 6, 2006). Iceweasel migrated (and Firefox was removed) on January 18, 2007. Debian's first stable release to include Iceweasel, Icedove, and Iceape was Debian 4.0 (Etch), released April 8, 2007. Soon after the renaming Debian also replaced Mozilla's unbranded logos with new logos designed to fit with the new names, drawn by Ricardo Fernandez Fuentes. User agent sniffing Some web sites do not recognize the browsers' user agent strings and refuse to work properly. As a workaround, Iceweasel 3.5.5 adds a "like Firefox x.x.x" string to the user agent. Firefox issue resolution Debian users who performed a in June 2016 received the following system message. According to Chris Hoffman of PC World, "After a decade, Debian and Mozilla are burying the hatchet. Iceweasel is about to re-assume its proper name". iceweasel (45.0esr-1) unstable; urgency=medium * The iceweasel package was replaced with the firefox-esr package. * Preferences under /etc/iceweasel/prefs will