Already pointed at manhwa.mubu.dev — install once, stays installed. No secrets to paste.
Progress syncs automatically while you read on Asura, HiveToons, or Vortex. Dashboard Continue links also mark chapters as read without the extension. Privacy policy.
Unlisted listing — works with the install link. One click, stays installed, auto-updates.
Fallback: .zip (load unpacked)about:addons → gear → Install Add-on From File….xpi and approve.Mozilla-signed — survives Firefox restarts.