# Sea Containers

> Containers sidebar for managing tabs.

Canonical page: [https://chrome-stats.com/d/sea-containers](https://chrome-stats.com/d/sea-containers)

## Overview

- **ID:** `sea-containers`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Jonathan Kingston
- **Category:** privacy-security,tabs
- **Daily users:** 495
- **Weekly downloads:** 40
- **Rating:** 3.75 / 5 (24 ratings)
- **Version:** 0.10resigned1
- **Last updated:** 2024-04-25
- **First published:** 2017-05-10
- **Size:** 281 KB
- **Data as of:** 2026-09-11
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/sea-containers/)
- **Website:** [https://github.com/jonathanKingston/sea-containers](https://github.com/jonathanKingston/sea-containers)

## Description

Sea Containers is a powerful Chrome extension designed to enhance your browsing experience by providing a convenient sidebar for managing your tabs. With this tool, you can effortlessly organize, navigate, and control your browser tabs, improving productivity and reducing clutter. Its intuitive interface integrates seamlessly into your browser, allowing quick access and efficient tab management without interrupting your workflow.

Whether you juggle multiple tabs for work, research, or entertainment, Sea Containers provides a streamlined solution to keep your browser organized. Its straightforward sidebar approach makes tab management simple and accessible, ensuring you stay focused and efficient throughout your browsing sessions.

## Rankings

- #5,033 — Overall
- #17 — contain
- #32 — contact
- #150 — seo

## Permissions and access

### Permissions

- `tabs`
- `contextualIdentities`
- `cookies`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Review summary

Sea Containers is praised for improving tab organization within Firefox by offering a clear overview and acting as a Tab Groups replacement. However, multiple users report critical issues such as inaccurate tab counters per container, inability to move tabs between containers, and high CPU usage. The UI has minor aesthetic annoyances and some features like adding new containers are non-functional or confusing. Importantly, the add-on appears abandoned, with no responses to user issues for a prolonged period, diminishing its utility.

### Pros

- Provides a convenient visual overview of containers and open tabs within them, aiding organization.
- Acts as a useful replacement for Tab Groups in Firefox 57 and above.
- Helps users manage and organize tabs across multiple containers effectively.
- Easy to open new tabs within containers, supporting workflow and tab management.
- Enhances the container feature in Firefox with added functionality and user interface improvements.

### Cons

- Issues with counters for currently open tabs per container not updating correctly after tabs are opened and closed.
- No functionality to move tabs between containers via drag-and-drop, right-click menu, or multi-select, limiting flexibility.
- CPU utilization spiking to 100% when using the add-on, causing performance concerns.
- The '+" button to add new container tabs does not function as expected, leading to user confusion.
- Lack of active development and responsiveness from the developer, with issues remaining unresolved for over a year.

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Source: [Chrome-Stats](https://chrome-stats.com/d/sea-containers)