Browser extensions starting with L

Lolli sends the hostname of every site you visit to its own servers to check for a cashback match.

Adds a context menu option to open long descriptions for page elements.

LoveDeals reports the host of nearly every site you visit to lovedeals.ai and scrapes your Google search result URLs.

Lucky PDF Converter's new tab page routes its 'coupons' and 'recommended' shortcuts to BeFrugal through a hardcoded affiliate link.

LetyShops sends account tokens and browsing events to Google Analytics and a GCP endpoint; opt-in on Firefox, opt-out on Chrome.

LINE購物省錢助理 sends every visited page URL to LINE Shopping's GraphQL API to check for partner shopping offers.

Leetcode helper by labuladong places the user's labuladong site token into a LeetCode page iframe URL.

Linguix sends text fragments surrounding grammar corrections to Amplitude analytics on any website.

Live Chat Overlay sends browser language, timezone, and YouTube video ID to its server on every live chat page load and injects the server's response into the page without sanitization.

Live Screen Recorder sends a persistent anonymous usage identifier to Google Analytics every hour.

Lightshot sends screenshot image data to its upload server over unencrypted HTTP.

Write LaTeX math equations and render them as copyable or downloadable images in Chrome.

Lazy Scholar sends scholarly article details, page URLs, tab metadata, and a stored user ID to an AWS API.

Lee-Su-Threads reads Threads profile details while you browse Threads and stores them in local browser storage.

LeetCode Video Solutions renders video-search results from lvsapi.soumya.dev as HTML on LeetCode problem pages.

Leetify for Codeforces accepts a login session token from any page loaded on localhost:3000, not just its own site.

Letterboxd Extras uses a built-in Kinopoisk API key for optional Kinopoisk rating requests.

LibrusPro fetches student profile, timetable, grade, and attendance records from Synergia for its Librus features.

Lilo sets Lilo as the browser's default search provider and sends search queries and suggestions to Lilo endpoints.

Link Grabber sends link-selection actions and the current page URL to Google Analytics.

Linkclump Pro lets webpages synthesize its mouse and key shortcuts to open tabs, windows, bookmarks, or copied links.

Linkwarden transmits every visited URL to the configured Linkwarden server on each tab activation and page load.

Looker Studio Auto Refresh sends a browser-derived identifier to Google Analytics when its popup opens.

Turns the new tab page into a visual workspace for organizing and searching bookmarks.

Location Guard ships a hardcoded third-party geocoding API key in its extension bundle.

LibKey Nomad assigns a persistent device UUID and transmits it alongside browser details to a.thirdiron.com on every article interaction.

Lock Adblock injects a hidden iframe pointing to loader.media into every page visited, starting four hours after installation.

Lightning Autofill fetches encrypted JavaScript from its servers and executes it on all pages for premium users.

Laitis Browser Extension relays commands from a local native app to inject scripts, proxy HTTP requests, and read content from any web page.

Leads Generator on Google Maps & Email Scraper sends Google Maps search responses and place IDs to orange.scrapejob.net.

Lector Biblioteca Ceibal lets approved reading sites query and remove matching browser bookmarks.

LeetCode Timer sends LeetCode submission code and timing details to codelytics.app after submission checks.

LiChess Tools uploads pasted or dropped Lichess inbox and profile images to api.imgbb.com for hosted image links.

LightCast Sender captures desktop or browser tab video and streams it to a remote receiver via Splashtop relay infrastructure.

LingTube sends watched YouTube video URLs to third-party audio conversion services when extracting audio.

Lingvanex sends the user's plaintext email address to PostHog analytics on every account login.

LinkSmart replaces matching Google search-page words with affiliate links from rules downloaded from api.linksmart.space.

LinuxDo Scripts sends linux.do forum content to user-configured AI API endpoints and backs up settings to a user-configured WebDAV server.

Live Transcript Extension includes hardcoded Symbl.ai credentials used to request speech API tokens.

Livescratch lets Scratch pages request its stored LiveScratch bearer token through an external messaging bridge.

Livewire devtools captures Livewire page component state for display in its DevTools panel.

LoadConnect sends load-board contact actions with load details and contact metadata to Carrierify analytics.

Localhost Open Graph Checker sends the active tab's head HTML to local-ogp.firebaseapp.com when clicked.

Lofi Girl contacts geolocation-db.com from its popup to infer the user's country on first open.

LogMeOnce captures webcam images and geolocation during login events and transmits them to its servers.

Logalty ClickOnce bundles a Windows executable and intercepts all HTTP/HTTPS navigations to detect and redirect ClickOnce application URLs.

Login Online sends typed new-tab search terms to loginonline.co autosuggest endpoints.

Lotus - Your Daily Focus New Tab sends new-tab search queries and onboarding names to Mixpanel analytics.

Lovable Project Downloader reads Lovable session JWT cookies and uses them to download project source files.

Lumina Night Mode fetches cross-origin stylesheets and places their contents into page-readable DOM.

Lyrics ( Youtube / Youtube Music ) inserts lyrics.co.kr responses as HTML into YouTube pages.

linkding extension sends active-tab URLs to the configured Linkding server when optional precache is enabled.

Ladders Apply4Me sends job URLs and titles to The Ladders when you use its Apply4Me buttons.

Language Reactor transformed captures a ChatGPT bearer token and sends it to appforlanguage.com during AI prompt generation.

Lasso lets any web page trigger its injected bridge to open a supplied HTTP(S) URL in a new active tab.

Learn languages with Netflix & YouTube sends selected page text to easy4learn.com for translation.

Leetcode Explained sends LeetCode problem text and editor code to OpenAI when you ask it to analyze or fix code.

Lessonly Recording exposes its installed status to every page through a DOM marker and window message.