Mozilla has released a preview of native containers in Firefox 153integrating the functionality of the Multiple Account Containers extension directly into the browser.
According to Mozilla’s announcement published on July 21, 2026, wrappers separate cookies and tracking data between different browsing contexts, allowing users to stay logged in to multiple accounts on the same site within a single window. This feature is available by default in Firefox 153 and does not require an extension.
Mozilla notes that this is a preliminary version. The integrated version does not yet include all the features of the original Multi-Account Containers extension.
What Firefox 153 native containers do and what’s included in the preview
Each container has its own cookie jar. Activity in one container is not visible to sites loaded in another, preventing cross-context tracking between different parts of a user’s navigation. Mozilla explains this by noting that searches for products in a container will not trigger ads in unrelated browsing sessions.
Mozilla highlights practical uses like managing multiple accounts on the same social platform, separating work projects from personal shopping, and isolating banking from regular browsing.
The Multi-Account Containers extension has supported this for almost a decade, and Mozilla claims that the native feature maintains the core functionality, flexibility, and visual identity of the plugin.
With the Firefox 153 preview, users can open tabs in specific containers, create and manage containers with custom names, colors, and icons, and adjust container settings through the Firefox settings interface.
Mozilla explains that the integration of Containers as its own feature is intended to keep the capacity visible by default. The goal is to save users from having to search for an add-on and support continued development of the feature directly in Firefox.
How to create and use containers in Firefox 153
Containers can be accessed through the tab bar and within Firefox settings. You can right-click any tab to open a container from the context menu or press and hold the new tab button to choose a container for a new tab.
To create your first container or rename, change the color, or update the icon of an existing one, open Firefox Settings. You can also manage the entire container list and adjust the settings for each container from the same Settings menu.
Existing multi-account container users do not need to take any action. Mozilla claims that the extension can continue running alongside the built-in Containers feature without uninstalling it.
Users who rely on features not yet available in the native version, such as per-site container rules, should keep the extension installed until Mozilla confirms full parity.
Missing features, feedback plans, and what’s next for multi-account containers
Mozilla has not published a list of multi-account container features that are missing from the native implementation, nor has it provided a timeline for when they might be added.
The company describes Firefox 153 as an initial step and mentions plans to refine the experience and develop additional context separation features on top of the current base.
Mozilla is collecting feedback on the preview via a dedicated thread on Mozilla Connect. The company has not confirmed when Containers will come out of preview status or if the Multi-Account Containers extension will eventually be discontinued.
