Temporary Containers opens tabs, websites, and links in disposable Firefox containers that isolate attached data and are deleted after use.
Sidebery
Sidebery manages Firefox tabs and bookmarks in a sidebar through a browser extension.
About Sidebery
Sidebery is a Firefox extension that manages tabs and bookmarks in a sidebar. It provides configurable sidebar panels, including vertical tab panels with a tree or flat layout, bookmark panels, and a history panel. Users can search within panels, customize the context menu and styles, and save snapshots of windows, panels, or tabs.
Sidebery may conflict with other extensions that control where new tabs open or that move or sort tabs, such as Tree Style Tabs. The developers recommend disabling such extensions to avoid unexpected behavior or broken tab states. Hiding Firefox's native tabs can be done with built-in vertical tab settings or with a userChrome.css file, and the source notes that a Firefox bug may cause one of these settings to be ignored after a browser restart or when a new window opens.
Key features
- Vertical tab panels with tree or flat layout
- Bookmarks panels for managing bookmarks in the sidebar
- History panel
- Search within panels
- Customizable context menu and styles
- Snapshots of saved windows, panels, or tabs
Best for: Firefox users who want to manage tabs and bookmarks in a highly configurable sidebar.
Good for
- Open source, with the code hosted publicly on GitHub
- Stable version is listed on the Firefox Add-ons site as reviewed by Mozilla
- Highly configurable sidebar with several panel types
Watch out for
- May conflict with extensions that handle new tab position or move or sort tabs
- Hiding native tabs requires either built-in Firefox settings or manual userChrome.css editing
- A Firefox bug may cause the native-tab hiding setting to be ignored after a restart or when a new window opens
Sidebery at a glance
- Website
- github.com/mbnuqw/sidebery
- Category
- Software & Utilities › Firefox Extensions
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
Sidebery alternatives
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Sidebery FAQ
Can Sidebery hide Firefox's native tabs?
The source describes two options: enabling Firefox's native vertical tabs and resizing the native sidebar to its minimum, or using a userChrome.css file to hide the horizontal tab bar. A Firefox bug may cause the setting to be ignored on the next browser start or when a new window opens.
Which other extensions can conflict with Sidebery?
The source names Tree Style Tabs as an example of an extension that handles the position of new tabs. It also mentions extensions that move or sort tabs. The developers recommend disabling these in the Add-ons Manager to avoid unexpected behavior.
What is the nightly version?
The nightly release is a signed build created through GitHub Actions. It supports auto-updates and is intended for testing new features. Previous nightly releases are listed in the Assets section of the latest release notes.
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