Sidebery vs Tabs Outliner
Sidebery
github.comTabs Outliner
tabsoutliner.comSide by side
| Figure | Sidebery | Tabs Outliner |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Plans published | 1 | 2 |
| Spec score · Tab Management Software | 7.8 (#9) | 7.8 (#10) |
| Privacy | The privacy policy says Sidebery does not engage in ad targeting or data collection, stores data locally by default, and sends data only when sync is enabled and only to the selected provider. | The privacy policy says basic use does not require an account, browsing history is not tracked on the developer's servers, and extension data is stored locally. |
| Support | The maker invites users to create a GitHub Discussion or email the developer with questions about the privacy policy; the add-on lists [email protected] as its support email. | The maker lists support for license issues, feature requests, and technical questions at [email protected]. |
Plans
In their own words
Sidebery
Sidebery is a free Firefox extension for managing tabs and bookmarks in a sidebar. Its panels can display tabs, bookmarks, and browsing history, with tabs shown as a flat list or tree. Users can group tabs under custom names, color and sort them, and automatically unload folded branches or inactive panels. Container features bind containers to panels, reopen URLs in selected containers, and set proxy or User-Agent settings. The extension also supports tab search, session restore, suspension, workspaces, snapshots, and optional cross-device synchronization. Context menus, mouse and keyboard controls, drag-and-drop behavior, and sidebar styles can be customized with variables and CSS. Data is stored locally by default; Firefox Sync or Google Drive can sync selected settings and tab data. The project is MIT-licensed. Firefox does not permit hiding the native horizontal tab bar, and some tab-moving add-ons may conflict.
Tabs Outliner
Tabs Outliner has no write-up on Specifiction yet; its figures are above.