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Adds fields for persistent global & fandom filters to works index pages on AO3
< Feedback de ao3 saved filters
https://greasyforks.org/en/forum/discussion/4318/
I just posted this; it might help you with this script :)
AO3 saved filters 1.1
So I run Elementary OS on a 2012 MacBook Air with Firefox v 33.0 and even though Ff tells me that i've installed the script successfully, i see no evidence of this and AO3 does not look any different.