Did you move this (C:\Program Files\Mozilla Firefox\extensions{972ce4c6-7e08-4474-a285-3208198ce6fd}) to another location, as per PM?
@hippy started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Did you move this (C:\Program Files\Mozilla Firefox\extensions{972ce4c6-7e08-4474-a285-3208198ce6fd}) to another location, as per PM?