According to Ruben himself earlier on Reddit, abrowser will still be the
default browser - Icecat will be in the repo as an alternative.
I hope he won't mind me quoting his message here:
"Both work around the main problems in Firefox: that it recommends non-free
software and that the trademark license restricts distribution for a fee and
distribution of modified versions unless the name is changed. Abrowser
follows the latest Firefox versions, while IceCat follows the latest ESR (v31
at the moment) version.
Abrowser, other that saner default settings to improve privacy, is pretty
much Firefox and should provide a quite "neutral" browsing experience.
IceCat on the other hand includes more aggressive freedom and privacy
features:
LibreJS blocks non-free JS scripts. It is experimental by now, so use it
with caution.
SpyBlock (a customized Adblock) filters any well known privacy trackers,
and in private browsing it blocks all third-party requests. Self-served ads
should be preserved.
Https-everywhere redirects you to https versions of websites
Anti-fingerprinting measures have been set, like spoofing the user-agent,
the referrers, and many other details.
Those features provide a much improved privacy, but with a not so neutral
browser experience as a tradeoff, meaning that some websites may break or
behave weirdly. This will improve when LibreJS gets more stable.
Because of those reasons Abrowser will be the default browser in Trisquel 7,
while IceCat will be an optional installation available in the repos (also
available in T6)."
