Browser extensions starting with U
205 browser extension security reviews, listed by name.
URL Shortener
Wilson
MediumUse Google Chrome™ as PDF Editor
PDFzorro.com
CleanPDF Editor Extension - PDFzorro uploads active-tab PDFs and screenshots to PDFzorro for conversion.
URL Extractor
CleanURL Extractor collects hyperlinks from each HTTP or HTTPS page you open and saves them in extension-local storage.
UTN.BA Helper
Pablo Matias Gomez
LowUTN.BA Helper uploads hashed student IDs, academic data, class schedules, and survey responses to its developer backend.
Udemy Course Downloader
devtool ai
LowUdemy Course Downloader opens an affiliate tracking tab on install and when downloads start.
UiPath Browser Automation 23.4
UiPath
CleanUiPath Browser Automation reads and modifies content on any page under the control of the local UiPath Studio desktop app.
Ultra Volume Booster
Trevis Diaz
LowUltra Volume Booster captures tab audio to amplify volume and sends usage telemetry to Google Analytics on startup and hourly.
UltraWide Streaming: custom ratios [QVI]
Streaming Extensions · Entertainment
LowUltraWide Streaming sends Disney+ and Amazon/Prime Video account, profile, and viewing data to me3x.online.
Umbrella - Copy All URLs
Clasicwebtools
CleanUmbrella - Copy All URLs copies open tab titles and URLs to the clipboard when you trigger its copy action.
UrbanTabs
pietechologiesinc
MediumUrbanTabs sends searches typed on its new-tab page to bseeksrc.com.
URL Shortener
ExtAdmin
HighUserGuiding+
userguidingdevelopers · Workflow & Planning
CleanUserGuiding - Better User Onboarding runs its editor on all sites and loads project data from UserGuiding APIs.

User-Agent Switcher
Linder
LowUser-Agent Switcher writes the configured UA string to each page's localStorage, where any page script can read it.
URL Scanner
D09r
MediumMalware & URL Scanner sends scanned URLs and domains to multiple reputation APIs, including several over HTTP.
UAR_SKT
CISOLUTIONS
MediumUAR_SKT captures the full page DOM on every navigation and forwards matching URLs to a locally installed SKT corporate management application via native messaging.
URL Scanner and QR Codes
QuickQRCode · Accessibility
MediumUSU Smart Alert Extension
USU GmbH
CleanUSU Smart Alert Extension sends the URL, page title, and browser identity to a native messaging host on every tab visit.
UWorld2Anki
Adel Hassan
CleanUWorld2Anki sends clicked UWorld question IDs to a local Anki helper.
Udemy Subtitle Translator - Yakuu
Orz99 · Education
CleanUdemy Subtitle Translator - Yakuu sends Udemy subtitle text to Google Translate for automatic translation.
UfunR
UfunR
CleanUfunR routes selected Chinese media-service traffic through the proxy chrome.paymentwiser.com:7777.
UiPath Web Automation 22.4
UiPath
CleanUiPath Web Automation injects into all web pages, captures user interactions, and relays them to a local UiPath robot via native messaging.
Ultimate Basketball Fan Extension
office@searchologic.com · Entertainment
MediumUltimate Basketball Fan Extension sends new-tab search queries to search.basketball-fan.com with a tracking ID.
Ultimate UK Visa Sponsor Checker
uh1bscx
LowUltimate UK Visa Sponsor Checker loads third-party donation images into job-site pages where it displays results.
UltraBlock
Ninble · Privacy & Security
HighUltraBlock sends each visited page URL and a persistent device ID to api.ultrablock.org as tabs finish loading.
Umbra Dark Mode
Forest Rasmussen
LowUmbra Dark Mode copies cross-origin stylesheet text into page-readable style elements on every site.
Undetectable AI - Human Auto Typer
ud-devs
CleanUndetectable AI - Human Auto Typer sends Google Docs text to its Human Typer backend during typing and humanization.
Unfolks - Find who doesn't follow you back on Instagram!
Özgür ÖZALP · Social & Communication
LowUnfolks reports Instagram workflow errors to Sentry with the current page URL, referrer, and user-agent context.
Unielon
dogeuni.com
LowUnielon has no dynamically confirmed privacy or security findings in this scanner.
UpDog - TikTok & Instagram Analytics
UpDog Marketing · Social & Communication
LowUpDog - TikTok & Instagram Analytics sends the signed-in Instagram username to a Supabase endpoint.
Upload to Google Drive™
Milext.com · Tools
CleanUpload to Google Drive captures a user-triggered screenshot of the active tab and uploads it to Google Drive.
uTorrent
DeepSeek · Functionality
MediumUtorrent For Chrome sends saved uTorrent Basic Auth credentials to non-magnet links opened from its context menu.
unFunnelizer
Rhea Victor
MediumunFunnelizer sends video download and conversion page URLs to Google Analytics and its backend.
UBC Workday Side by Side Calendar
martinlou2002
LowUBC Workday Side by Side Calendar copies MyWorkday cookies into browser request header rules.
URL Shortener & QR Code Generator - QuickLink
Tim Peters · Workflow & Planning
CleanQuickLink sends the active tab URL to is.gd to create shortened links and shortened QR codes.
UiPath
UiPath
LowUiPath downloads and executes JavaScript code supplied by a local native host in both its background page and every web page visited.
Under New Management
Class V LLC
CleanUnder New Management sends installed extension IDs to ExtensionBoost for developer-change checks.
User Presence for MS Teams Web Client
iamacarpet
CleanUser Presence for MS Teams Web Client injects periodic mousemove events into Teams tabs to keep status available.
UFABC next - extensão
ufabcnext
HighUFABC next sends university session cookies and page tokens to api.v2.ufabcnext.com.
UNISPY: Shopify Inspector Sales Tracking Spy
unispy.io
CleanUNISPY scans Shopify pages, stores catalog data locally, and sends visited store domains to Similarweb.
URL Link Previews for Gmail™ by cloudHQ
cloudHQ · Communication
CleanURL Link Previews for Gmail by cloudHQ sends compose links and clipped page metadata to cloudHQ services.
Unblock Bilibili-海外解锁B站,免费解除地区限制,观看体育赛事直播
六毫秒
CleanUnblock Bilibili can disable other enabled proxy extensions from its popup.
UpSearches
upsearches · Workflow & Planning
MediumUpSearches sends search-event telemetry with persistent identifiers to webinline-usage.streamesh.net.
UchiHelper
OKExtensions
MediumUchiHelper sends Uchi.ru access tokens and uid cookies to dz-helper.ru while automating exercises.
Unfollow AI - Followers & Unfollowers Tracker
yasin.muratogullari
LowIG Unfollow AI exposes an analyzer page that reads Instagram follower lists and sends avatar URLs to proxy.lazytech.workers.dev.
Unikey - IME tiếng Việt cho ChromeOS
Lê Quốc Tuấn
CleanUnikey processes typed characters locally to compose Vietnamese text in ChromeOS input fields.
UnlockTube - ВПН для YouTube без ограничений в России. Ускорить Ютуб на ПК
katia.noomova
LowUnlockTube routes selected YouTube and Telegram domains through bundled proxy servers when its VPN mode is on.
Usersnap - Capture visual feedback & bugs
Usersnap GmbH
CleanUsersnap captures the active tab screenshot and URL when you use its feedback popup and passes them to app.usersnap.com.
URL Auto Redirector
crispgm
LowURL Auto Redirector redirects some matching HTTPS pages to HTTP versions using its enabled default rules.
USG Group User Cookie
CleanUSG Group User Cookie sets a persistent internal_user cookie on USG websites.
Udio AI Music Generator
MediumUdio AI Music Generator reads your Chrome profile ID and sends it to livepolls.app for extension login.
UnInternet
Nathan Miranda · Functionality
LowUnInternet loads a remote Font Awesome stylesheet from cdnjs when its popup opens.
Unfollowers for Instagram - Insta Detective
Insta Detective
CleanUnfollowers for Instagram - Insta Detective contacts a GetPantry basket from its popup feedback form.
UpAlerts: AI Cover Letters
Shajeel Afzal
MediumUpAlerts: AI Cover Letters exposes its account email to scripts on Upwork, Fiverr, and LinkedIn through a page event bridge.
UpLead - Find Emails on Websites
UpLead
CleanUpLead - Find Emails on Websites sends the active tab URL to Segment analytics when its popup opens.
Urban View
gnomiv1980
MediumuDomainFlag
bella.network
CleanuDomainFlag sends each visited top-level domain with a persistent extension UUID to dfdata.bella.network.
UI Kits (formerly Library) for Wix Editor
Certified Code
LowUI Kits for Wix Editor accepts Wix editor messages that write supplied component data to local storage and clipboard.
URL Shortener - TinyURL Extension
dev.bergda
CleanURL Shortener - TinyURL Extension sends the current tab or clicked link URL to TinyURL when you shorten it.
Udesly Template Configurator
Udesly
CleanUdesly Template Configurator reads Webflow project pages, CMS items, and member settings into a local export.
Umami
Umami · Household
CleanUmami sends supported recipe-page URLs to www.umami.recipes to check whether they can be imported.