Browser extensions starting with C

Compresses PDF files to smaller sizes and lets users save the results locally or to Google Drive.

Consenter Einwilligungsagent exposes its stored consent settings to scripts on any website through a message bridge.

Console Wallet sends each active page hostname to its own phishing-check API.

Contacts & Group Number Export for WhatsApp reads WhatsApp Web contacts and group metadata when the user runs an export.

Contador de Seguidores sends selected Instagram account details to Invertexto endpoints.

ControlUp Enrich sends page and user context telemetry to ControlUp while scanning supported pages for device matches.

Copy All URL's 2.0 statically configures a redirect for yt3.ggpht.com requests through youtube.vulpine.email.

Copykiller sends user-selected page text to copykiller.com for plagiarism and AI-generation checks after submission.

Cristiano Ronaldo (CR7) MeaVana sends public IP addresses and Urban Dictionary searches to third-party APIs over HTTP.

Color Picker For Firefox captures the visible tab when you start picking a color.

CFCA CertEnrollment.CZCB Extension bridges web pages on czcb.com.cn to a local native PKI application using caller-supplied host names.

Canvas GPA Calculator checks every visited site for a Canvas API endpoint before saving the first Canvas domain it finds.

Canvas downloader. Find and export. reads canvas image data and source URLs from matched pages on request.

Chat GPT Extension loads Font Awesome CSS from cdnjs.cloudflare.com when its popup opens.

Chatterclock reads ChatGPT conversation requests and cookies locally to update per-account message counts.

Citationsy - Cite Websites and Papers sends the active tab URL or extracted DOI to Citationsy when you use the popup.

Cities HD Backgrounds in Your New Tab sends search-box queries to spntextension.com.

Classifieds List sends new-tab search terms to classifiedslist.org and calls GeoIP2 to derive the user's city and state.

Claude Usage Meter reads Claude.ai organization and usage-limit data to show local usage status.

Claude to PDF, Word and Google Docs reads your Chrome profile email on install and sends it with a generated ID to Thinksolv.

Color Finder reads page color styles on all HTTP/HTTPS pages and sends the palette to its extension popup.

CondividiStudioWeb reads DOM data on Italian government tax portals and forwards local download file paths to a native messaging host.

Convert PDF to Word uploads selected documents and conversion task details to qwerpdf servers.

Copy All Urls copies the titles and URLs of tabs in the current window to the clipboard.

Copy as Plain Text lets webpages update its paid license state through a page-dispatched Paddle event.

Corgi AI ships hardcoded Voicemaker and Google Analytics credentials in its extension bundle.

Shows a country flag for the active website based on the server’s location.

Cristiano Ronaldo Wallpaper sends top-site URLs from its new-tab page to Google's favicon service.

Cute Cats & Kittens Wallpaper reads Chrome's most-visited sites to show them on its new-tab page.

Cốc Cốc Search lets Cốc Cốc search pages read the browser's top sites list.

Capture screenshot & Screen Recording uploads user-triggered screenshots and screen recordings to scrsht.com.

ChatGPT in Sidebar loads remote stylesheets from Cloudflare CDN and jsDelivr when its options page opens.

Cookie auto decline automatically changes consent choices by writing site cookies and localStorage.

CFCA CertEnrollment.YZW Extension bridges web pages to local native messaging hosts using a caller-supplied host name with no allowlist.

CFCA CryptoKit.YZW Extension accepts a caller-supplied native messaging host name, allowing any whitelisted page to connect to any native application on the user's machine.

CNFans Warm Reminder Remover rewrites shopping product URLs on CNFans, Mulebuy, and Hoobuy to add referral codes.

CWS: Chinese Dictionary + Pinyin Annotator lets matched pages ask the extension to write page-supplied text to the clipboard.

Capfizz sentry node sends its session token to a remote-configured Capfizz mining node from the popup.

Cars Wallpaper sends new-tab search terms to qsrcfornow.com with affiliate parameters.

Cashback Assistant sends merchant-site visit events to Google Analytics with a persistent extension-generated client ID.

Cashback Comparison sends non-prefiltered active tab URLs to CashbackHolic for coupon badge lookups.

Chartnote removes Content-Security-Policy headers from every top-level site you visit.

Chat AI opens a cleartext WebSocket that includes the signed-in Firebase user ID.

ChatGPT Prompt Assistant loads a Buy Me a Coffee image beacon on supported AI chat pages.

ChatGPT Side Panel removes frame-protection headers so ChatGPT and OpenAI pages can load inside its side panel.

Clarie sends your approximate location to its weather service when the new tab page loads.

CoRecruit sends recruiting-site contact IDs and phone numbers to Quil when creating meetings.

Commerce Cloud Recommendation Validator captures CQuotient and Salesforce Einstein request details for its tab UI.

ContentBot AI Writer sends user-triggered writing prompts from page fields to ContentBot's API.

CookBook Manager sends the active tab's page HTML and URL to its recipe parser when you import a recipe.

Cookie Editor lets a tumutuk.com paywall iframe enable an affiliate tag on Amazon product-page visits.

Cookie Manager Pro reads cookies for the active tab domain and lets the user export them as JSON.

Cristiano Ronaldo - Cristiano Ronaldo HD wallpaper sends precise location coordinates to OpenWeatherMap for new-tab weather.

CrowdStrike Threat Intelligence Browser Extension scans page text for indicators and sends matches to CrowdStrike APIs.

Crunchyroll Comments sends Crunchyroll watch and series page URLs to restore.crunchycomments.com.

Cuponeria sends shopping-site extension page views to Google Analytics with a persistent extension UUID.

Cute Dogs Wallpaper sends new-tab search queries to cute-dogs-wallpaper-com.s1search.co.

The extension bridges scoped bank and CA web pages to native messaging hosts, but accepts the host name from the caller without validation.

Calligra online - office, graphics & email sends visited page URLs to OffiDocs with a persistent extension-generated username.