

It is currently compatible with video streaming sites like YouTube and Vimeo.ġ-Click YouTube Video Download is free and lightweight YouTube video downloader which lets user download videos in all formats. User can also add videos to their personal video list for future playback or download. Video Downloader Professional allows user to download and save videos playing on a website to their computers. It also gives notifications whenever video is available to download. It enables users to grab audio, video as well as image files from various media streaming sites like YouTube. Video Download Helper is cross-platform Mozilla extension and it is very popular add-on available for Firefox. It supports downloading full HD as well as 4K videos from the platforms like YouTube and DailyMotion. With the help of this add-on you can download any type of flash file with just a single click. You can explore more about the tool on its official site or its GitHub page.Flash Video Downloader is free and one of the best downloading tools and it is very simple to use. However, Mozilla gets access to the source code to review with every release, which makes it a recommended add-on to try. They clarified the reason as they do not want competitors to use the add-on and contribute nothing in return (more in their forum post). The server-side is open-source but unfortunately, the add-on is not open-source. Not just a privacy-focused, open-source alternative, it works super quickly without impacting your writing experience. As I write this, I have LanguageTool Firefox extension active. It should be good enough for basic spellcheck and common grammatical mistakes. It is free to use, with an optional premium upgrade for advanced correction features. LanguageTool is an open-source grammar and spellchecker that respects your privacy, making it a decent alternative to the likes of Grammarly and others. But, this is an exception as a non-foss add-on, where the service is originally open-source, but the extension is not. Note: For this list, we try to recommend Firefox add-ons that are totally open-source.
