| Stash | | - | | |
| Star-Button In Urlbar | | - | | |
| SortPlaces | | - | | |
| Sort By Name Tweak | | - | | |
| Sort Bookmarks | | - | | |
| SimpleSort Bookmarks | | - | | |
| Simple bookmarks menu | | - | | |
| Simple RSS Reader (SRR) | | - | | |
| Simple Bookmarks Tree | | - | | |
| Simple Bookmarks | | - | | |
| Sidebar Bookmarks Search Plus | | - | | |
| Show Parent Folder | | - | | |
| Show Keyword | | - | | |
| Set As Bookmarks Toolbar Folder | | - | | |
| SearchPlaces | | - | | |
| Search with Bookmarks | | - | | |
| Search Bookmarks Button | | - | | |
| SavedSearchButton | | - | | |
| Save-To-Read | | - | | |
| Save Tab | | - | | |
| Sage++ (Higmmer's Edition) | | - | | |
| Sage | | - | | |
| Replace bookmark (975195) | | - | | |
| Replace bookmark | | - | | |
| Replace Bookmark | | - | | |
| Reliby | | - | | |
| Really Simple Rss | | - | | |
| Reading List (830081) | | - | | |
| Reading List | | - | | |
| Read Later Fast | | - | | |
| Read It Later | | - | | |
| RapidTabOpener | | - | | |
| RandomBookmark | | - | | |
| Random Bookmark From Folder | | - | | |
| Random Bookmark (880984) | | - | | |
| Random Bookmark | | - | | |
| RSSPreview | | - | | |
| RSS Ticker | | - | | |
| RSS Handler for Feedly | | - | | |
| QuickMark | | - | | |
| QuickFox Notes | | - | | |
| QuickCut | | - | | |
| QuickBookmarkToFolder | | - | | |
| Quick Bookmarks Saver | | - | | |
| Quick Bookmark by Jay H. | | - | | |
| Popup Bookmarks | | - | | |
| PlainOldFavorites | | - | | |
| Places’ Full Titles | | - | | |
| Places' Tooltips | | - | | |
| Places Context Menu | | - | | |
