Browser extensions starting with U

Blocks ads, trackers, malicious URLs, and other web content using configurable filter lists.

Urban VPN captures keystrokes, checkout PII, and browsing activity from 133 ecommerce sites and transmits them to falais.com servers.

Provides VPN-based access to Chinese video and music services from outside China.

Removes selected YouTube distractions such as recommendations, Shorts, comments, and end-screen suggestions.

Finds free legal full-text PDFs of scholarly articles while you browse research pages.

This extension lets you switch the browser user-agent string while browsing.

uBlock sends daily encrypted per-domain telemetry to eyeo's servers and a persistent-UUID ping to ublock.org with OS and browser details.

This extension adds a free 3D city car driving and drifting game to the browser.

This extension shortens the current page link and can generate a QR code for sharing.

This extension shortens the current page or a pasted link and can generate a QR code for the URL.

Records screen and audio during UserTesting research sessions for website and digital experience feedback.

This extension hides user-specified sites from Google and other supported search engine results.

UV Weather sends popup analytics with a device ID and IP address to event.uvw.workers.dev using a bundled Basic credential.

This extension gathers browser performance metrics to monitor SaaS solutions through UXM.

UiPath Web Automation loads and executes JavaScript from a local native messaging host and can inject that code into any open browser tab.

Enables right-click menus, text selection, and copying on websites that block them.

This extension helps overseas users access web services in mainland China.

Automates common Cookie Clicker actions such as clicking cookies, buying items, and handling popups.

Access onchain apps and manage an EVM crypto wallet from a browser sidebar.

Blocks pop-ups, banners, video ads, and trackers on most websites.

Switches the browser user-agent string from a toolbar button.

Blocks ads, trackers, and malware sites using uBlock Origin filter lists in a development build.

This extension shortens the current page URL and copies the shortened link to your clipboard.

User-Agent Switcher and Manager fetches its agent list from cdn.jsdelivr.net at an unpinned @latest reference with no integrity check.

Ultimate Color Picker captures the visible tab when you click it to sample colors locally.

UpSeller captures product page HTML and Shopee authentication headers from e-commerce tabs and transmits them to app.upseller.com.

Unpaywall reads DOIs from pages you visit and transmits them to api.oadoi.org to look up open-access versions.

URL Shortener sends the page, selected link, image, or typed URL you shorten to the chosen shortening service.

This extension resizes web videos to remove black bars and fit the screen.

User Agent Switcher, URL sniffer can log visited request URLs and exposed request headers when its sniffer is enabled.

uBlock Origin Scope monitors and displays all remote server connections made by each browser tab, storing results locally in session storage.

This extension helps UT Austin students compare, save, and plan courses during registration.

Removes unnecessary black bars from videos on supported sites.

Unblocked Games — New Tab sends top-site and bookmark URLs to gamestabs.com for favicon loading.

Unsplash Instant assigns each user a persistent UUID and transmits it to Google Analytics on every new tab open.

Urban Safe Browsing sends all-site navigation details and request/response metadata to Urban VPN safe-browsing servers.

UI5 Inspector lets page scripts trigger injection of extension-packaged scripts into the active tab.

USPS Tracking replaces the browser's default search engine with trackingnumbers.org, routing all omnibox searches and partial keystrokes to a third-party operator.

UiPath Studio Web Automation provides browser automation capabilities for UiPath RPA workflows via native messaging and broad content script access.

Universal Copy sends the hostnames of sites you visit, plus your IP, country and a persistent ID, to its Aliyun logging server.

uTab routes every new-tab search through search.utab.io with a persistent per-user id before redirecting to Bing.

RoGold Ultimate transmits Roblox gameplay data to rogold.live every minute and loads remote CSS without integrity verification.

This extension notifies Facebook users when someone removes them as a friend.

Urban AdBlocker sends URLs, page titles, referrers, and request metadata from visited pages to Urban VPN.

Controls which websites can load cookies, scripts, images, frames, and other request types.

uBlacklist filters search results on Google and other engines using user-maintained or subscription blocklists.

Udemy Dual Subtitles sends tab URL, tab title, and a persistent user UUID to its own backend and to Amplitude on every subtitle translation request.

Ultra Volume Booster captures tab audio to amplify volume and sends usage telemetry to Google Analytics on startup and hourly.

Undetectable AI sends selected page text to its detection, humanizing, paraphrasing, and citation endpoints when you use its tools.