Browser extensions starting with F

Find sci paper forwards the active tab URL or selected text to the configured Sci-Hub domain.

Inspect typography details on a webpage, including font, size, color, and contrast for selected text.

This extension saves and restores groups of browser tabs as reusable sessions.

This extension translates web page content locally in Firefox.

Send online faxes from Chrome to recipients in more than 180 countries.

Flash Player that Works fetches game listings from fflashgames.com and injects them into its popup without sanitizing the returned content.

Adds small clocks for local and worldwide time zones to the browser interface.

Freedom - Website Blocker for Chrome redirects blocked pages to blocked.freedom.to with the original URL in the query string.

FadBlock Origin fetches its ad-detection rules from a remote GitHub Pages endpoint on install and update.

Fast save and repost for Instagram collects Instagram session cookies and auth headers, and sends Instagram link URLs to third-party spector.cx domains on user interaction.

Flag Cookies reads cookies and browser storage for the active tab so it can display and manage them locally.

Flash AI sends the full URL of nearly every page you visit to its servers to detect product pages.

Folx reads cookies for any downloaded URL and forwards them to the local Folx download manager app via a custom URL scheme.

This extension shows Google Slides fullscreen while keeping them interactive and editable.

Flash Player Plus sends a persistent unique user ID and session timing data to flplayer.net on a recurring schedule.

FedEx Tracking redirects all omnibox searches to trackingnumbers.org and sets a persistent UUID tracking cookie that is restored if deleted.

This extension keeps site settings tools available for Webflow users in Chrome.

Firma con token bridges Argentine government websites to a local digital-signing token via Chrome native messaging.

Fitkun Batch Download Image lets any website send chosen image URLs through its hidden iframe to Baidu or 1688.

Font identifier assigns each browser profile a persistent UUID and transmits it with telemetry events to onlineapp.pro.

Footballguys Extension: Manage My Leagues sends fantasy-site cookies to Footballguys pages on request.

FoundersCard Chrome Extension fetches a benefit list from founderscard.com and injects server-controlled HTML into every visited web page.

Saves e-pity and fillUp form data in the extension’s internal storage.

folkX captures visible profile data from Gmail, X, Instagram, TikTok, WhatsApp, Facebook, and Meet and syncs it to its own CRM backend.

Flight Tab Pro redirects all address-bar and new-tab searches through Yahoo affiliate URLs that pay the publisher per query.

F.Block Sponsored sends its Facebook ad-block counter to fblocksponsored.de during updates and uninstall setup.

FLG accepts login tokens from page events and uses them for FLG Platform API requests.

FMHY SafeGuard fetches unsafe-site reason text from GitHub and inserts it into search results as HTML.

Fabric web clipper sends the clipped page URL, title, HTML, and reader text to api.fabric.so when saving a bookmark.

Faceit EGO Enhancer embeds a clash.gg gambling ad iframe with affiliate tracking on FACEIT room pages.

FaniMani.pl Donation Reminder sends visited page URLs with a persistent user identifier to FaniMani stats and Google Analytics.

Fast Wallet sends biometric auth keys and a persistent device identifier to api.suiet.app, a third-party server, during biometric setup.

FastStunnel VPN can fetch an HTTP bootstrap file that selects the API server receiving login credentials and session tokens.

Fenerbahçe SK Anasayfa's new-tab search box loads and executes remote JavaScript returned by a third-party search API.

Fiverr Mate reads a Syntaximos login cookie and sends it to apifiverrmate.syntaximos.com to obtain an extension API token.

Flappy Budgies Offline fetches network-filtering rules from a remote server on startup and installs them to control browser traffic.

Flight Fare Compare opens fare-comparison sites with your Google Flights route, dates, passenger details, currency, and locale.

Flowith Web Clipper sends clipped content to Flowith's dev-edge server with a bundled API key.

Fontiran downloads font and site rules from chrome.fontiran.com and injects matching font CSS into enabled pages.

Force Copy injects a main-world script that can override copy, keyboard, and context-menu restrictions on visited pages.

Force Paster sends paste activity, active hostnames, and field tags to a Cloud Functions analytics proxy.

Free AI ReCaptcha Solver by Raptor stores solved reCAPTCHA images and labels and uploads them to captcharaptor.com.

Freighter sends data-sharing wallet usage telemetry and dApp domains to Amplitude.

Frontier Slither exposes its ID, version, and detected Slither-related extensions to Slither pages.

FunPay Tools sends chat history and seller draft text to fptools.onrender.com for AI assistance.

Funkify - Disability Simulator lets parent pages trigger clicks inside cross-origin iframes through its content script.

Madomi - Manga Translator sends page text, image URLs, and image data to borang.skrin.xyz for translation and summarization.

FoE - Helper uploads in-game profile and building data to api.foe-rechner.de when GlobalSend is enabled (on by default).

Foxy Gestures is a local mouse-gesture extension that operates entirely within the browser with no external data transmission.

Forecastfox loads its API URL configuration from s3blog.org on startup with no integrity check, then routes all weather and location queries through those URLs.

Flag Cookies reads cookies and localStorage from every visited site to display them in its popup, with no observed remote transmission.

FantasyPros injects a content script on all pages that can be triggered by any site to read and transmit a user's Sleeper auth token.

FACEIT Predictor sends FACEIT match, player, history, map, and auth token data to its prediction API.

FC 26 Coins Generator FUT captures your EA Ultimate Team session token and sends it to api.futfun.com.

FYI reads the active tab PDF and uploads its encrypted document bytes to foundry.fyi.app.

Fabasoft Folio 2020 relays cookies from any visited page to the local Fabasoft native host when a first-caller web page opens the messaging channel.

Fable sends active-tab URLs to Segment and accepts page messages that forward URLs and page snippets to Fable.