Browser extensions starting with C

CXone Agent Noise Cancellation provides audio noise cancellation for NICE CXone contact-center agents and exposes no external data collection.

Place calls through Cisco Jabber directly from the browser.

Hides selected Twitter interface items to create a calmer browsing experience.

Replaces the new tab page with a customizable dashboard of widgets and sidebar tools.

ChemDraw Web Clipboard bridges clipboard requests from any webpage to a local native messaging host on the user's machine.

ChinaHelper silently redirects ordinary AliExpress product page visits through an affiliate link carrying the developer's own tracking IDs.

Checks websites and provides real-time security warnings while you browse.

Adds browser access to Clockwork PHP application runtime metrics for development and debugging.

Collibra Browser Extension connects to a configured Collibra instance and sends search activity and login events to Pendo.io analytics.

Compresses PDF files online to reduce their file size for uploads, email attachments, or archiving.

Searches specific content sites from the browser address bar using @ commands.

Shows a customizable clock in the browser toolbar with notifications and time tools.

Copy Youtube Transcript sends YouTube transcript text and your chat prompt to cyt.hamzaw.com.

Coursology sends selected text and tab screenshots to its AI API and stores user-uploaded files publicly on Vercel Blob storage.

CrapApi Http Test syncs your saved API requests, including headers and credentials, to its backend over unencrypted HTTP.

Converts highlighted prices and amounts into multiple currencies using current or saved exchange rates.

CyberGhost VPN Free Proxy bundles a hardcoded shared API key that is sent to its backend on every request.

Checker Plus for Gmail monitors your Gmail inbox and, when AI Compose is used, transmits email subject and reply text to a vendor-operated cloud proxy.

BestPrice Assistant scans every page you visit for product data and reports it to bestprice.gr's servers.

CCH® Browser Search transmits search queries and a user identifier to cchconnect.cch.com on every Google, Bing, and Google Scholar search.

CFCA SecEditCtl.SRCB Extension bridges pages on srcb.com and shrcb.com to a locally installed native messaging host without validating the host name supplied by the caller.

CMS Detect sends the active tab's URL to cmsdetect.com over plaintext HTTP each time the popup is opened.

Cart'In automatically overrides your Amazon.fr delivery location to a fixed French postcode on every visit.

Cartoon Yourself sends selected text to cartoonify.de over plain HTTP via a context menu shortcut.

ChatGPT Assistant Plus sends a persistent UUID to Google Analytics hourly and silently opens chatgpt.com tabs to refresh session tokens.

GPT Reader intercepts the user's OpenAI session token on chatgpt.com and transmits account credentials to readeon.com.

Access and manage Google Drive files from a browser button without opening the full Drive page.

This extension redirects Cortana and Bing searches in Chrome to a user-selected search engine.

Chromium browser automation records user interactions including password field values and replays them by executing caller-supplied scripts in page context.

City Bus Driver Car Game opens a promotional publisher webpage on install and redirects to it on uninstall.

Cloaq requests IP geolocation from ip-api.com over HTTP whenever its popup opens.

Clutter Free prevents duplicate tabs and transmits user IP addresses to geoplugin.net over unencrypted HTTP when the premium page is opened.

This extension opens comic book files such as CBR, CBZ, and PDF in Chrome.

Companion Window sends the full URL of pages you visit plus a persistent user ID to GiveFreely's analytics server when its review prompt fires.

Adds model switching, conversation export, customization, and interface enhancements to Perplexity AI.

Connecteur de sécurité banque à distance bridges BPCE-group banking pages to a local certificate-signing application via native messaging.

Contact Saver for WhatsApp reads every contact, group member, and label from WhatsApp Web and exports the dataset to a local CSV/XLSX file.

Copies selected web text to the clipboard without formatting.

Copycat Ads sends Facebook Ads Library search, ad, and advertiser data to its backend during tool use.

Counting Characters sends the active tab URL to countingcharacters.com when users click its webpage word-count link.

Create Link executes user-defined JavaScript in the content script context on every page visited when a custom format filter is set.

Cross-border Product Collection scrapes Shopee product listings and forwards product data and page URLs to BigSeller's servers.

Crunchyroll Speeder exchanges your Crunchyroll session cookies for an OAuth token and reads your account, history, and subscription data.

Cursorland applies user-selected custom cursors across all visited pages using SVG images fetched from cursor-land.com.

Custom Search Tool overrides the default search engine and sends all user searches to Yahoo with hardcoded affiliate tracking parameters.

City Scapes sends every new-tab search query to a third-party monetized search proxy instead of your browser's default search engine.

CS2 Trader scrapes Steam API keys and access tokens from Steam pages on install and sends item inspection data to its developer backend.

C2 Password reads form credentials on all sites, auto-fills stored logins, and disables Chrome's built-in password saving.

CFCA CertEnrollment.SRCB Extension bridges SRCB bank pages to locally installed native messaging hosts without validating the host name.

Enables CFCA U-key certificate authentication for Bank of Beijing personal online banking.

CFCA CryptoKit.SRCBSCF Extension bridges CFCA-affiliated banking pages to a local native messaging host for cryptographic operations.

CFCA WebSeal.SRCB Extension bridges bank web pages to local native security software via native messaging, accepting the target host name from the calling page without validation.

CORS Unblock rewrites CORS response headers across all sites when its unblock mode is enabled.

This extension helps developers evaluate the strength of Content Security Policy settings.

Cambridge Dictionary Lookup sends selected text to Cambridge Dictionary when you choose its lookup menu item.