No. 7 of 27 ·Tab Management Software

Sidebery

Extension

Freedom report

Two barsScore 6.3

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely0 of 6 device platforms
DocumentedPlans, terms and facts published

Sidebery is ranked #7 of 27 in tab management software on Freedom251. It runs on Browser extension. There is a free plan.

Sidebery plans and pricing

All plans

Sidebery Free Firefox extension · donations accepted github.com · 4 Oct 2026

Compared on tab management software

Free plan: Yes
Tab search: Yes
Session restore: Yes
Tab suspension: Yes
Workspaces: Yes
Browser support: firefox
Cross-device sync: Yes

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The record

Purpose: Sidebery is a Firefox extension for managing tabs and bookmarks in a sidebar.
Panels: It provides customizable panels for tabs, bookmarks, and browsing history.
Tab layouts: Tabs can be shown as a flat list or a tree, grouped with custom names, colored, sorted, and automatically unloaded in folded branches or inactive panels.
Containers: Container features include binding a container to a tabs panel, reopening tabs in a target container by URL, and setting proxy and User-Agent configuration for container tabs.
Customization: Users can customize the context menu, mouse and keyboard controls, drag-and-drop behavior, and sidebar and group-page styles with variables and custom CSS.
Snapshots: Snapshots can be configured to save information about open windows and tabs.
Synchronization: Optional sync providers named in the privacy policy are Firefox Sync and Google Drive.
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.
Sync data: Users can choose which settings, context-menu configuration, keybindings, custom styles, and selected tab data are synchronized.
Permissions: Required permissions are access to recently closed tabs and browser tabs; additional permissions are optional and support features such as bookmarks, history, proxy settings, and snapshot export.
Compatibility limit: The project warns Sidebery may conflict with add-ons that position, move, or sort tabs, potentially causing unexpected behavior or broken tab state at initialization.
Native tabs limit: The add-on page says Firefox does not allow extensions to hide the native horizontal tab bar and points users to userChrome.css workarounds.
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.
Security reporting: The security policy supports the latest version published on addons.mozilla.org and directs vulnerability reports to [email protected].
Price from: Free

Where it ranks on Freedom251

Best Tab Management Software in 2026#7 of 27

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Sources

github.com/mbnuqw/sidebery· checked 4 Oct 2026
addons.mozilla.org/en-US/firefox/addon/sidebery/· checked 4 Oct 2026
github.com/mbnuqw/sidebery/blob/v5/PRIVACY.md· checked 4 Oct 2026
github.com/mbnuqw/sidebery/blob/v5/SECURITY.md· checked 4 Oct 2026