Browser extensions starting with C

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.

This extension opens and displays DXF CAD files from Google Drive or a local computer in Chrome.

Translates YouTube subtitles and adds English dubbing for foreign-language videos.

Adds CCF category labels to academic paper results on supported research websites.

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.

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

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.

Adds a cute pixel-art cat companion to webpages as you browse.

Loads aeronautical chart PDFs from suppliers into the ChartFox web application.

Provides quick access to ChatGPT from the browser for asking questions and getting answers.

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

Shows ChatGPT model usage, reset timing, PoW-based status checks, and chat export/import tools.

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

Adds chat replay access for supported stream archive videos.

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.

Hides YouTube distractions such as Shorts, comments, recommendations, and feeds.

Clears selected browsing data from the browser toolbar.

Clears stored site data for only the current tab.

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

Converts Lark Cloud Documents to Markdown for downloading or copying.

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

Verifies that supported web app code matches the published version.

This extension shows gas price information for Bitcoin, Solana, Ethereum, Base, Polygon, and other networks.

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.

This extension displays Contentsquare UX metrics directly on your website.

Search selected text and pages with custom search engines from menus and toolbar controls.

Backs up browser cookies and restores them later after a new machine or fresh OS install.

Adds a hold-to-click auto clicker for Cookie Clicker with a configurable clicks-per-second setting.

Manage browser cookies from the toolbar with viewing, editing, deletion, import, and export tools.

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.

Downloads multiple CoreTax DJP tax invoices and e-Bupot documents from the active page in one click.

This extension provides a multi-chain crypto wallet for accessing Web3 networks and managing digital assets.

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 reads your Crunchyroll account profile, watch history and subscriptions and uploads them to me3x.online.

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

This extension lets you set custom browser user-agent strings for specific websites or URLs.

Choose and restore older YouTube layouts from 2008 through 2021.

This extension helps you create and download customizable anime-style cartoon avatars.

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

Copies selected text without formatting and supports plain-text paste from the clipboard.

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