Browser extensions starting with L
347 browser extension security reviews, listed by name.
Lookup - Website Profiler
Lookup
MediumLookup - Website Profiler sends page HTML and URLs from visited sites to joinlookup.com when remote lookups need more data.
Looper for Youtube 2.0
V & G
LowLooper for Youtube 2.0 writes its extension URL and incognito state into YouTube page sessionStorage.
Loopio Extension (New)
Loopio
LowLoopio Extension (New) lets HTTPS pages trigger storage changes that make it inject its scripts into the tab.
Lot Size Calculator
Avant Infinity
LowLot Size Calculator sends TradingView pair analytics with a persistent browser or subscription identifier.
Lucky VPN & Proxy
Lucky VPN · Privacy & Security
MediumLucky VPN & Proxy embeds a ProxySeller API key and uses it from the popup to retrieve proxy inventory.
Luffy in Gear 5 Live Wallpaper
Ovkas
CleanLuffy in Gear 5 Live Wallpaper sends saved shortcut URLs to Google's favicon service.
Lunabot - AI on any webpages
Lesslab
LowLunabot sends each top-level page URL and title to Lunabot web-config APIs.

linkding extension
Sascha Ißbrücker
Mediumlinkding extension sends active-tab URLs during opt-in precaching and can send API tokens over HTTP Linkding URLs.

LiveReload - Web extension
Todd Wolfson
CleanLiveReload - Web extension injects a localhost LiveReload script into pages after you enable it.

LiChess Tools, by Siderite
Siderite
CleanLiChess Tools uploads pasted chat and profile images from Lichess pages to imgbb.com.

Lettres Gratuites
Lettres Gratuites
CleanLettres Gratuites adds a Google search-page iframe and sends coarse letter-template query context to its server.

Lettres Gratuites
Lettres Gratuites
LowLettres Gratuites sends a letter-template search match flag from Google searches to lettres-gratuites.azurewebsites.net.

Live editor for CSS, Less & Sass - Magic CSS
webextensions.org
MediumMagic CSS fetches Sass compiler JavaScript from cdnjs and injects it into the active tab in Chromium browsers.

Live Start Page - Speed Dial
ApptitudeGlobal
LowLive Start Page sends history-derived top-site hostnames to everhelper.pro during first-install speed-dial setup.

Lab Ray Logger by Jellyneo
Jellyneo.net
CleanLab Ray Logger by Jellyneo reads Neopets lab result page content and posts it to Jellyneo.

LocalWeatherAlerts
LocalWeatherAlerts
MediumLocalWeatherAlerts sends each completed page URL and tab context to its server for sponsorship responses.

Lyrics Here by Rob W
Rob W
CleanLyrics Here by Rob W sends music page titles and song metadata to configured search and lyrics providers.
LBD: Download Resumes in Bulk from Linkedin™
CleanDownloads resumes in bulk from LinkedIn job applications.
LBS数据采集
douhapdemo
LowLBS数据采集 sends each visited hostname to scrm.maoxiaoqi.com and uploads scraped Maps business listings.
LLMs.txt Checker
David Dias
CleanLLMs.txt Checker checks each visited website for llms.txt and llms-full.txt files.
LTI Debugger
pfbgray
CleanLTI Debugger displays LTI launch data and network request details inside its DevTools panel.
LYH DOI Tools
LYH
CleanLYH DOI Tools stores URLs and discovered DOI strings from visited web pages in Chrome sync storage.
LaTeXGPT: Compile LaTeX from ChatGPT and More
bitbiteapps
CleanLaTeXGPT sends user-selected LaTeX code from configured sites to texlive.net for compilation.
Lamborghini Aventador Live Wallpaper New Tab
Gameograf.com
LowLamborghini Aventador Live Wallpaper New Tab loads remote popup HTML into its new-tab page.
Lamborghini Live Wallpaper
Gameograf.com · Art & Design
LowLamborghini Live Wallpaper inserts remote HTML from Gameograf into its new tab popup.
Lamborghini Revuelto Live Wallpaper
Gameograf
LowLamborghini Revuelto Live Wallpaper loads remote popup HTML from api.gameograf.com into its new-tab page.
Lamine Yamal Iconic Ball Control Live Wallpaper
Ovkas
CleanLamine Yamal Iconic Ball Control Live Wallpaper sends saved shortcut URLs to Google's favicon service.
Lamine Yamal Wallpaper
walltab
CleanLamine Yamal Wallpaper sends custom new-tab shortcut URLs to Google's favicon service.
Land Insights Toolkit
Land Insights
MediumLand Insights Toolkit sends LandPortal account, billing, subscription, and cancellation data to api-landportal.vercel.app.
Landing Page Ripper
thelanders.club
MediumLanding Page Ripper sends your Chrome profile email and captured page URLs to track.landingpageripper.com.
Lanmma - AI Powered Language Companion
mosaeed162005
CleanLanmma sends selected page text and surrounding context to Gemini or Groq when you ask it to analyze a selection.
Laya Tree
lear12580
LowLaya Tree lets page scripts send inspector commands that read and modify Laya game objects.
Lazuli
ADSR1042
LowLazuli inserts remote teacher-score feed values into ZJU course-selection pages as HTML without escaping.
LeadBook
leadbook
CleanLeadBook sends Facebook profile names to an AWS Lambda endpoint when gender, country, or tier filters are enabled.
LeadNear: Free Email Finder
leadsnear
CleanLeadNear: Email & Phone Finder scrapes LinkedIn profiles and search-result lists and sends them to www.leadnear.com.
Leads Connect
The Platform AI
MediumLeads Connect sends Instagram account IDs to app.socialeai.com when country or gender filters are used.
Lecture Summariser
LectureSummariser
CleanLecture Summariser sends user-triggered lecture transcripts to its Firebase summarization function.
Leexi - Google Meet recording
Leexi
CleanLeexi records Google Meet participant voice activity and sends it to api.leexi.ai every 30 seconds.
Legal Forms and Agreements
tamasbalazs1977
LowLegal Forms and Agreements opens selected legal-document links on LawDepot over cleartext HTTP.
Leganto Cite it! Bookmarking Tool
Ex Libris, Part of Clarivate
LowLeganto Cite it! Bookmarking Tool lets any website ask the extension to reload an open tab.
Les bons Plans remises & Cashback FLOA
Plebicom
MediumLes bons Plans remises & Cashback FLOA sends recognized merchant visits to Google Analytics with a persistent extension client ID.
Lets Kick It!
gawbly
LowLets Kick It! loads a BetterTTV sound asset when matching Kick chat keywords appear.
Letterboxd Streaming Providers
adlerzei
LowLetterboxd Streaming Providers bundles a decodable TMDB API bearer token and sends it to api.themoviedb.org.
Levi: Immobilien Cashflow & Mietrendite berechnen
Leverage Immo GmbH
CleanLevi: Immobilien Cashflow & Mietrendite berechnen sends the active tab's page HTML and URL to app.leverage.immo.
Librezam
FoxRefire
LowLibrezam can send recorded audio samples to ACRCloud when its default recognition credentials are enabled.
LightningProxies Extension
LightningProxies · Privacy & Security
LowLightningProxies Extension supplies stored proxy credentials to every HTTP authentication challenge.
LigoAI
Ertiqah, LLC.
CleanLigoAI sends selected social posts and saved article content to ligosocial.com when users invoke its AI and inspiration features.
Likers Pro - Auto Like
Yue Apps
CleanLikers Pro - Auto Like sends Instagram targets and signed-in user identifiers to Mixpanel.
Likes Export: Extract Post Liker Details
suiyantubai695
CleanIG Likes Export reads your Instagram account ID cookie and sends it to its vendor backend.
Limbic for Therapists
Limbic Ltd
LowLimbic for Therapists can send delimited page text from later sites to Limbic Atlas after retaining stale EHR context.
Lingo Champion
Mink
LowLingo Champion sends selected words and matching visible page sentences to lingochampion.com for translation.
Link Unshortener
Tim · Privacy & Security
MediumLink Unshortener sends matching shortened-link navigation URLs to linkunshorten.com through redirect rules.
LinkHub
linkhub
CleanLinkHub sends user-authored LinkedIn comments and post context to api.linkhub.gg after successful comment posts.
LinkedIn AutoApplier
AutoApplier
CleanLinkedIn AutoApplier sends a stripped copy of failed LinkedIn application pages to its backend.
LinkedRadar-Headline Generator for LinkedIn™
patrickoliver2653
CleanLinkedRadar-Headline Generator for LinkedIn sends headline prompts and copied generated text to an Aliyun SLS log.
Lionel Messi Live Wallpaper
Ovkas
LowLionel Messi Live Wallpaper sends saved new-tab shortcut URLs to Google's favicon service.
Lionel Messi Live Wallpaper
haberikra · Art & Design
LowLionel Messi Live Wallpaper sends each saved new-tab shortcut URL to Google's favicon service when rendering shortcuts.
ListenOnRepeat: Youtube to LOR
Listenonrepeat · Fun
LowListenOnRepeat: Youtube to LOR ships a Google YouTube Data API key in its popup playlist request.
Live NBA Scores & Stats - GameDash
Prathmesh Patel · Entertainment
LowLive NBA Scores & Stats - GameDash sends page-view details from every website to Mixpanel.
Liver
Ziga Macele · Fun
LowLiver sends popup requests to Holodex with a bundled API key.