@lanodan @drewdevault @ska
Free Software Definition talks about 4 essential freedoms, not in terms of whether a license preserves them, but in terms of whether the user has them.
For example, freedom 1 - to modify and run modified versions - doesn't work if the software in question is Firefox and web standards are evolving so fast, that you can't reasonably keep a modified version functional for an extended period of time.
Web browsers deny you that freedom through non-license means.
1/