- r -
- R : GeoCalculator
- READ_CONTENT : Notifications
- READ_DIGEST : Notifications
- READ_FEED : Notifications
- READ_MAIL : Notifications
- READ_MARK_ALL : Notifications
- READ_MARK_AUTO : Notifications
- READ_MARK_MANUALLY : Notifications
- READ_UNKNOWN : Notifications
- REDDIT : SocialBookmarking
- REMOVE_EXACT : Scheduler
- REMOVE_LIKE : Scheduler
- RESCHEDULE_24_HOURS : Scheduler
- RESCHEDULE_DIE_HARD_1 : Scheduler
- RESCHEDULE_DIE_HARD_2 : Scheduler
- RESCHEDULE_DIE_HARD_3 : Scheduler
- RESCHEDULE_RUSHHOUR1 : Scheduler
- RESCHEDULE_RUSHHOUR2 : Scheduler
- RESCHEDULE_RUSHHOUR3 : Scheduler
- RESCHEDULE_TERMINATOR_1 : Scheduler
- RESCHEDULE_TERMINATOR_2 : Scheduler
- RESCHEDULE_TERMINATOR_3 : Scheduler
- RIGID_FRESHNESS : ConfigCacheHeaders