Firefox Color customizes website colors, themes, dark mode, or browser appearance.
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FastStream is a browser extension that replaces videos on websites with its own video player. It pre-buffers video in the background and uses parallel requests, and offers subtitle features, audio and video adjustments, and remappable keybinds. It supports MP4, HLS and DASH streams. Livestreams and DRM-protected content are not supported, and the player is described as a work in progress.
Flagfox is a Firefox extension with a development blog that posts update release notes. Recent entries cover versions 6.2.2 through 6.2.6 for Firefox 115+, listing fixes, options page changes and monthly IPv4 and IPv6 address location database updates.
Floccus is a browser extension and mobile app that syncs native browser bookmarks privately across browsers and devices. It supports sync via Nextcloud Bookmarks, Linkwarden, KaraKeep, Google Drive, Dropbox, Git servers and WebDAV services. Users can create multiple sync profiles and control sync strategy, interval and synced folder.
This page states that the FluxTV site is shutting down soon and directs visitors to fluxtv.co.uk for now, which is noted as soon to be deprecated. It lists alternative sites and recommends using the uBlock Origin extension.
foobar2000 is an advanced freeware audio player for Windows, macOS, Android and iOS, with the Windows version working on Linux via Wine. It plays mainstream audio formats out of the box, supports gapless playback, advanced tagging, Audio CD ripping and transcoding, ReplayGain, DSP effects and internet radio. An open component architecture allows third-party extensions.
FoxyProxy is a service offering VPN and proxy servers in 67+ different countries with 6 ways to connect, alongside free open-source proxy management software for browsers. Its extensions for Chrome, Edge, and Firefox include Basic, which switches IP address with a single click, and Standard, which switches based on URLs and other rules and patterns.
Fraidycat is a desktop app or browser extension for Firefox or Chrome used to follow people across platforms such as Twitter, blogs, YouTube and public TiddlyWiki. Instead of a news feed, it shows a list of recently active individuals with two-line summaries. Follows are arranged by tag and given an importance level that sets how often Fraidycat checks them.
FrankerFaceZ is a Twitch enhancement suite available as a user script and browser extensions. It adds custom emotes, including animated and wide emotes, to Twitch channels and offers chat filtering, interface personalization and advanced moderation tools.
FreeFileSync is a free open source data backup application for comparing and synchronizing files and folders on Windows, macOS and Linux. It determines differences between a source and target folder and transfers only the minimum data needed rather than copying every file. The website also references a separate Business Edition available for license extension.
FreeHostingEU.com offers free web hosting with PHP and MySQL support, no forced ads on free sites, and short free domain names under the .eu5.net extension. The free plan lists 200 MB of web space, 4000 MB monthly data transfer, five short web addresses, one-click WordPress and Joomla installation, and FTP and webmail access.
FshareTV is a site that streams classic movies online for free, with a collection updated daily and subtitles in multiple languages. It offers a learning feature that displays and translates words in subtitles, activated from an icon in the video player, and a two-subtitle option for language learning while watching. A free companion Chrome extension called Sublearning supports English learning with YouTube videos. Movies can be browsed by year, category and country.
FuseBase Capture is a free browser extension for Chrome, Firefox, and Edge that enables users to take screenshots, record screencasts of desktops or browser tabs, and create webcam videos. It is part of Nimbus Web Inc's product suite for team collaboration.
Gemini CLI is a terminal-based tool that brings Gemini models into the local development environment. It can query and edit large codebases, generate apps from images or PDFs, and automate workflows. Documentation covers configuration, extensions, agent skills, and IDE integration. Release channels include nightly, preview, and stable.
genei is a research tool that uses an AI algorithm to summarise articles, analyse research and find key information. It offers AI-powered summarisation and keyword extraction for groups of PDFs or webpages, document management with projects and folders, and reference generation. A Chrome extension add-on summarises webpages or saves them for later reading.
Geode is a fan-made extension for Geometry Dash that adds mod support to the game. It is open-source and offers an in-game mod list for Windows, macOS, Android and iOS, along with a hooking syntax and built-in UI components for modders. The site notes that Geode is currently broken after the Geometry Dash 2.2091 update and that a fix is in progress.
Get-cookies.txt is a GitHub-hosted tool that retrieves cookies.txt files locally on the user's device without transmitting any user information to external servers. It is compatible with Google Chrome and Firefox, and can be installed via the respective web stores or from source code.
Gist AI is a free Chrome extension powered by ChatGPT that summarizes websites, YouTube videos, and PDFs, including files stored on the device. It extracts key points from long content and allows users to read more of the summary source or jump to relevant segments of a YouTube video. It imposes no limit on content length.
Git Large File Storage (Git LFS) is an open source Git extension for versioning large files. It replaces large files such as audio samples, videos, datasets, and graphics with text pointers inside Git while storing the file contents on a remote server like GitHub.com or GitHub Enterprise. Installation is available for Windows, Mac, and Linux. Tracking file types does not convert pre-existing files, which requires the git lfs migrate command.
GitLab snippets lets users store and share bits of code and text with other users. Snippets can contain multiple files and support version control, commenting, cloning, embedding, downloading, and syntax highlighting. Users can create personal snippets independent of any project or project snippets tied to a specific project, and manage them through the GitLab user interface, the GitLab for VS Code extension, or the glab CLI.
Global Speed is a web extension for setting a default speed for video and audio. It applies speeds automatically and allows URL rules for specific sites, and it is offered for Edge, Firefox, or Chrome.
Go Speed, also called Gopeed, is a free, open-source download manager built with Golang and Flutter, available for Windows, macOS, Linux, Android, iOS, and web. It supports HTTP, HTTPS, BitTorrent, magnet, and ed2k download protocols, uses a multi-threaded engine for fast downloads, and offers a JavaScript extension system and RESTful API for automation and extended functionality. Extensions enable downloading YouTube videos, HuggingFace AI models, and files from cloud storage services.
Goguma is an IRC client for mobile devices. It supports many IRCv3 extensions and offers a simple interface, offline reading of past conversations, and low resource usage for older phones. Its main target platforms are Linux and Android, with iOS also supported.
Goo.su is a free URL shortening service that turns long links into short URLs for sharing in posts, messages and comments. It offers a Chrome extension and additional features such as click statistics and link management after signing in.