Download Accelerator & Manager is a powerful add-on that enables you to download big files with multi-threaded technique. It uses an smart and multi-threaded JavaScript engine to divide the input file(s) in to several sections and then download all sections in parallel. Just enter desired thread number in popup and then add a download task. In order to add a new download, you have 2 options. 1st option is adding a download through context-menu item in right click. Simply right click on a desired download link and then click on the - Download with Accelerator - item in right click. Alternatively, you can open toolbar popup UI and add a desired download link in the designated area (top left corner). Please note that, when you add a URL, please first adjust the number of threads (default value is 3). Also note that, currently maximum number of threads is 5 (in future version this limitation will be removed). Note: currently, the maximum number of threads (simultaneous downloads) is 5. In future, support for more threads will be added. If you have a feature request, or suggestions to improve the add-on, please fill the bug report form in the addon's homepage.