feat(browser): migrate librewolf to flatpak for host-isolation

Move LibreWolf from native librewolf-bin to Flathub
io.gitlab.librewolf-community. Bubblewrap isolates the browser from
$HOME (\\.ssh, password-store, gnupg, ssh-agent socket) at the cost
of namespace chroot + IPC/network namespace isolation between content
processes (mozilla bug 1756236, P3, considered defense-in-depth).
seccomp-bpf — the dominant sandbox layer — is preserved.

- meta/flatpak.txt: + io.gitlab.librewolf-community
- meta/browser.txt: - librewolf-bin
- run_onchange_after_deploy-firefox.sh.tmpl: profile path moves to
  ~/.var/app/io.gitlab.librewolf-community/.librewolf
- dot_config/mimeapps.list: librewolf.desktop -> flatpak app id
- dot_local/bin/executable_linkhandler: flatpak run wrapper
- README.md: blurb + new profile path

arkenfox-user.js + chezmoi user-overrides.js deploy keep working
unchanged because the flatpak profile is still on the host fs.

1 files changed, 1 insertions, 1 deletions

diff --git a/dot_local/bin/executable_linkhandler b/dot_local/bin/executable_linkhandler
index 747adc5..48dd6ae 100755
--- a/dot_local/bin/executable_linkhandler
+++ b/dot_local/bin/executable_linkhandler
@@ -41,7 +41,7 @@ case "$url" in
     setsid xdot "$url" >/dev/null 2>&1 &
     ;;
   http*)
-    librewolf "$url" >/dev/null 2>&1 &
+    flatpak run io.gitlab.librewolf-community "$url" >/dev/null 2>&1 &
     ;;
   *)
     $TERMINAL -e "$EDITOR" "$1"