Mozilla Firefox is non-free opensource software, time for a boycott?

I was installing Firefox on my Sabayon distro, and I got this message:

╠  +++ >>>  (3/3) www-client/firefox-41.0.2
╠    ## Unpacking: www-client:firefox-41.0.2.a8662b1bbaf4b2f7a7bb0fef570ca934690665e2~0.tbz2
╠    ## Package phase: setup
 * 
 * You are enabling official branding. You may not redistribute this build
 * to any users on your network or the internet. Doing so puts yourself into
 * a legal problem with Mozilla Foundation
 * You can disable it by emerging firefox _with_ the bindist USE-flag
╠    ## Package phase: preinstall
╠    ## Installing package: www-client/firefox-41.0.2
╠    ## [Firefox Web Browser]
╠    ## Updating installed packages repository: www-client/firefox-41.0.2
╠    ## Package phase: postinstall

After DRM, non-free services such as Pocket, supporting patented and royalty bearing video codecs such as MPEG4, and even filing software patents, Firefox really need a boycott.