Where is Icecat's plugins directory on GuixSD?

I want to try to add libflashplayer.so to Icecat. As it was on other distributions needs to add this file to plugins directory. But on GuixSD I have lot of them and nothing works! So there each user has own set of applications in /gnu/store/hash-hash-hash floders. I copied libflashplayer.so to that directory whereis icecat showed and also to that another! that ps aux| grep icecat showed. Not helped. $ whereis icecat icecat: /gnu/store/r0y15j99qw6qr11m94n4agdfc7k4b3fx-profile/bin/icecat $ cd /gnu/store/r0y15j99qw6qr11m94n4agdfc7k4b3fx-profile/ /gnu/store/r0y15j99qw6qr11m94n4agdfc7k4b3fx-profile$ ls bin/ etc/ include/ lib/ libexec/ manifest sbin share/ # mount -o remount,rw /dev/sda1 /gnu/store # cp /home/user/Downloads/libflashplayer.so /gnu/store/r0y15j99qw6qr11m94n4agdfc7k4b3fx-profile/lib/mozilla/plugins/ # cd /gnu/store/r0y15j99qw6qr11m94n4agdfc7k4b3fx-profile/lib/mozilla/plugins/ # chmod 555 libflashplayer.so .. flash plugin did not appear in icecat .. $ ps aux | grep icecat g 546 10.2 7.9 2137612 274108 ? Sl 19:31 1:00 /gnu/store/rsw9m66npbnazx4b34xfdjyv6jqvrpsi-icecat-52.6.0-gnu1/bin/icecat g 655 8.4 4.7 1841212 164176 ? Sl 19:34 0:31 /gnu/store/rsw9m66npbnazx4b34xfdjyv6jqvrpsi-icecat-52.6.0-gnu1/lib/icecat-52.6.0/plugin-container -greomni /gnu/store/rsw9m66npbnazx4b34xfdjyv6jqvrpsi-icecat-52.6.0-gnu1/lib/icecat-52.6.0/omni.ja -appomni /gnu/store/rsw9m66npbnazx4b34xfdjyv6jqvrpsi-icecat-52.6.0-gnu1/lib/icecat-52.6.0/browser/omni.ja -appdir /gnu/store/rsw9m66npbnazx4b34xfdjyv6jqvrpsi-icecat-52.6.0-gnu1/lib/icecat-52.6.0/browser 546 tab g 701 0.0 0.0 8260 1672 pts/2 S+ 19:41 0:00 grep --color icecat # mount -o remount,rw /dev/sda1 /gnu/store # cp /home/user/Downloads/libflashplayer.so /gnu/store/rsw9m66npbnazx4b34xfdjyv6jqvrpsi-icecat-52.6.0-gnu1/lib/icecat-52.6.0 /gnu/store/rsw9m66npbnazx4b34xfdjyv6jqvrpsi-icecat-52.6.0-gnu1/lib/icecat-52.6.0# ls application.ini dependentlibs.list gtk2/ liblgpllibs.so libmozsandbox.so plugin-container browser/ dictionaries/ icecat libmozavcodec.so libxul.so removed-files chrome.manifest fonts/ icecat-bin libmozavutil.so omni.ja run-icecat.sh defaults/ gmp-clearkey/ libflashplayer.so libmozgtk.so platform.ini Not helped. .. I have so many other icecat directories... /gnu/store# find . -name icecat ./9glblfajzylgc3acvs00mvvf7pqy90hx-profile/bin/icecat ./dy3ivfy8yhmgai3rvjn1372yk0xy46cn-icecat-52.6.0-gnu1/lib/icecat-52.6.0/icecat ./dy3ivfy8yhmgai3rvjn1372yk0xy46cn-icecat-52.6.0-gnu1/bin/icecat ./30rclhg4hvyq0hczi3srabj791cyrx4y-profile/bin/icecat ./gm34i143bcyikqi83rjra23nay9yvv3l-profile/bin/icecat ./szfjspmjaip91rar72mq3rx1x9l5p3f8-profile/bin/icecat ./v78cwsbpl8nv9iqzjb8rpi5y5wgbf11n-profile/bin/icecat ./ig8yhn3i4fkr7dwbjlfjjyivmq56mh79-profile/bin/icecat ./gcw5b9gnfx3asy9kk2wva7q19zc8qmnm-profile/bin/icecat ./7n1d0c63jdfb3aafdzsw1gp5w3mnn3j2-profile/bin/icecat ./l8s46d8d9q6pkax4hcbdwjzsw4s9sp2n-profile/bin/icecat ./q7z68xlagis0rcwg816mf2msap0p2vfr-profile/bin/icecat ./4yx95c82pdfp67nba6gdhqgb9a4mbngd-profile/bin/icecat ./fqjcmap5yfd3870ai2qkghr4mq1rg9ma-profile/bin/icecat ./8vj84jsmw5bzh4prjx05f05xl4kk809q-profile/bin/icecat ./6sqhwknpavy7rnl67x5cy3rvm7420hr2-profile/bin/icecat ./cqgzk7agfv7wh91h6pms428vdj7wcjyb-profile/bin/icecat ./idz1699459i8495av4gxkkf2b3jdngki-profile/bin/icecat ./bq2c0p4bl18fh0fbd0zav0svnry9c60x-icecat-52.6.0-gnu1/lib/icecat-52.6.0/icecat ./bq2c0p4bl18fh0fbd0zav0svnry9c60x-icecat-52.6.0-gnu1/bin/icecat ./fan1w2c7kdrkdyhrwnjnriw389n3dy3d-profile/bin/icecat ./pv0isppwbhbpx6sdhwvkg9ddnib3irph-profile/bin/icecat ./6hd3lxhh8mlfnsv6ahd4wz014m33rcd2-profile/bin/icecat ./iwp89xlwn7bnblrrx3vsiiq8gm59r1vr-profile/bin/icecat ./lg45r1nsp1pb3zhh051nr23acpx2a1h3-profile/bin/icecat ./pg8wwm18bbglzarxbi92vyi1g7ifn7d8-profile/bin/icecat ./m02lxm92p7pzmhf7dmmn58miza98inp6-profile/bin/icecat ./czgs3d74agkd7i4fjj90phpkd0myr3d6-profile/bin/icecat ./34f36n0lg23kiykq2sx6p7j4jlxvz14i-profile/bin/icecat ./xdb121jz892lkiq9zd3v9rl60q44c3k0-profile/bin/icecat ./54c5sm8cj92saxn80jh5jr92mxa72440-profile/bin/icecat ./jvg9hd1lrnb7q4n6yd8parc12bp51n77-profile/bin/icecat ./rsw9m66npbnazx4b34xfdjyv6jqvrpsi-icecat-52.6.0-gnu1/lib/icecat-52.6.0/icecat ./rsw9m66npbnazx4b34xfdjyv6jqvrpsi-icecat-52.6.0-gnu1/bin/icecat ./b93whc8i26vkcmvh89blwmz5jh92k9xh-icecat-52.6.0-gnu1/lib/icecat-52.6.0/icecat ./b93whc8i26vkcmvh89blwmz5jh92k9xh-icecat-52.6.0-gnu1/bin/icecat ./pdmdhrqi3xllm5mlaqv8wk5400dqmza8-profile/bin/icecat ./0nfvxhmqj7vxark1bwwa4x5qqqf03czd-profile/bin/icecat ./pby1gzld8s2bbd9bs83vhmmhazgpbsql-profile/bin/icecat ./5km3ibyq3clwmzdgr3zx43rwa77gw5sd-profile/bin/icecat ./6f407nqnd87qaz1q1f4ydnb5sclr4jv9-icecat-52.6.0-gnu1/lib/icecat-52.6.0/icecat ./6f407nqnd87qaz1q1f4ydnb5sclr4jv9-icecat-52.6.0-gnu1/bin/icecat ./l1g1n415rvsp9vafcd19v2yqkn2yz9ns-icecat-52.6.0-gnu1/lib/icecat-52.6.0/icecat ./l1g1n415rvsp9vafcd19v2yqkn2yz9ns-icecat-52.6.0-gnu1/bin/icecat ./4ah8j8c98vz0jfi2n9xci7387r6afx3s-profile/bin/icecat ./9bbvxz62dc41nn6xh8q24dsq4dhxn3h1-profile/bin/icecat ./r6cqi1pw8wlf0yfz8rbcgby007xq0ysy-icecat-52.6.0-gnu1/lib/icecat-52.6.0/icecat ./r6cqi1pw8wlf0yfz8rbcgby007xq0ysy-icecat-52.6.0-gnu1/bin/icecat ./bqw3k6cv85hff2n9i96s0ds6kipzjfng-profile/bin/icecat ./r7fyy4lfbwbiqlwg6hmdpd2yfh0fwpcb-icecat-52.6.0-gnu1/lib/icecat-52.6.0/icecat ./r7fyy4lfbwbiqlwg6hmdpd2yfh0fwpcb-icecat-52.6.0-gnu1/bin/icecat ./srdm0rc203b7xrq27k4njjxvb236w7b4-profile/bin/icecat ./0walzaklznp3qnkvihc92ch3101gripm-profile/bin/icecat ./r0y15j99qw6qr11m94n4agdfc7k4b3fx-profile/bin/icecat ./7ql4wcxhk6fzwr0ydjfzciijp5bq62xs-icecat-52.6.0-gnu1/lib/icecat-52.6.0/icecat ./7ql4wcxhk6fzwr0ydjfzciijp5bq62xs-icecat-52.6.0-gnu1/bin/icecat ./jqqym4wcvl0aaq0h1nif722wayf98b0r-profile/bin/icecat Where is that exact directory with icecat plugins for a certain user?