DownThemAll! is an advanced file accelerator for Firefox and one of the most popular extensions for this browser. It is an interesting and much more powerful alternative to the data retrieval mechanism built into Firefox.

Allows you to download all the files or images placed on the website, while offering many useful features and configuration options. DownThemAll! allows you to download multiple data at once, pause and resume the download at any time, set the download speed and the number of simultaneous connections.

The extension also allows you to use metalinks or additional mirrors to retrieve data from multiple servers at the same time.