Browser extensions starting with M

My IP Hider VPN transmits user account passwords in plaintext in URL query strings and stores them unencrypted in local extension storage.

Clip web pages and selected content into readable Markdown files for offline use.

Blocks browser-based cryptocurrency miners across websites.

AI New Tab sends the active tab's page text, title and URL to its Meomni backend when you use the AI chat.

Mailtag records sent Gmail message metadata and plaintext email body to app.mailtag.io after sending.

M3U8 Downloader fetches and merges HLS video segments from user-supplied URLs and saves them locally as .ts or .mp4 files.

M3U8 Downloaders sends selected media URLs, page titles, and referring tab URLs to m3u8downloaders.com.

MCP SuperAssistant sends page URLs, titles, environment details, and a persistent client ID to Google Analytics.

Converts images, video, audio, documents, archives, and other files through context menu, toolbar, or address bar options.

MEMO Cashback Bestshopping fetches Bestshopping's cashback catalog while checking visited sites for merchant matches.

MSN Homepage, Bing Search & News sends a Bing MUID cookie and persistent machine ID to g.ceipmsn.com during telemetry pings.

Syncs your Madden collection with the MUT.GG website.

Use a Belgian eID card reader with MYDIGIPASS.

MYO Studio sends icon search requests with an embedded Yotoicons API key.

Replaces the new tab page with a macOS-style dashboard for widgets, search, quick links, bookmarks, and themes.

Maestro Label Designer Font Finder sends your installed font names to OnlineLabels pages that request them.

Mail Merge for Gmail sends recipient lists and email body content to lite.anothermailmerge.com for delivery.

MailChimp Templates for Gmail sends your Gmail addresses, including switcher accounts, to cloudHQ on page load.

MailKing sends your Gmail address, open thread IDs and other signed-in Gmail accounts to cloudHQ.

MailMaestro reports the active Gmail account email address to app.maestrolabs.com when Gmail loads.

Mailinblack lets any website set its trusted service URL before the first legitimate connection.

Replaces the new tab page with time-management prompts for planning tasks and focusing on goals.

Blocks ads, trackers, scam pages, malicious sites, and cryptominers while browsing.

ManageJobApplications imports job posting details from the active HTTPS tab and sends them to managejobapplications.com.

This extension changes the new tab page to provide manual search and Yahoo-powered web search.

This extension provides a Markdown editor with live preview and one-click HTML conversion in Chrome.

This extension formats Markdown articles for WeChat public accounts and multi-platform publishing.

Hides unwanted listings and ads from Marktplaats search results.

Marvis lets its local native host control tabs and read page content, cookies, and browser storage.

Mass Friends Remover for Facebook | mobile posts the Facebook friends-page DOM to its server when page parsing fails.

This extension changes YouTube thumbnails to a MatPat-style look while browsing.

This extension applies selectable Material-style themes to Chrome DevTools panels.

Math Solver for Chrome uploads user-selected screenshot regions to Mathway Solver for OCR and problem solving.

McAfee SafeKey fetches server-controlled JavaScript from its vendor and executes it in every page's DOM.

McGill Enhanced lets users submit parsed transcript course and grade rows to a Google Forms endpoint.

Measure pixel dimensions and element positioning on the current web page.

Medium Parser opens Medium article URLs through third-party reader and cache services.

Meet Chat Transcribe sends Google Meet chat transcripts to Google Apps Script and Google Docs after you enable transcription.

MeetMe Dolby Voice 1.1 relays postMessages from any web page to a native messaging host with no origin validation.

Automatically closes Zoom meeting launch tabs after you join a meeting.

Opens a playlist of YouTube channel membership-only videos from a channel page.

Create memes from images on websites using a right-click menu option.

Puts inactive Chrome tabs to sleep to reduce memory usage.

Adds a hidden collectible cat to each page you visit.

Adds buttons and links to GitHub pull request pages for common Mergify tasks.

Previews and exports Mermaid diagrams from Markdown code blocks on supported web pages.

Opens Facebook Messenger in a resizable standalone desktop window from the browser toolbar.

Downloads images and videos from ads in the Meta Ads Library.

MetaSuites sends blockchain explorer page details and transaction data to BlockSec APIs.

Metaview enables Datadog session replay on Ashby and Greenhouse pages and sends replay data to browser-intake.metaview.ai.

MetricMaster sends searches typed on its new tab page to meter.metermaster-ext.com with a fixed tracking ID.

Mettl Proctoring disables other installed extensions during exams and sends proctoring logs to a configured Mettl API.

Microsoft Bing Homepage & News sends persistent Bing and local identifiers to g.ceipmsn.com over HTTP.

Microsoft Bing InPrivate sends a persistent machine ID and browser details to g.ceipmsn.com over HTTP.

Microsoft to Microslop rewrites Microsoft text on pages you visit into Microslop.

MillionPugs disables installed ad blockers during its cashback redirect flows.

Visualizes web pages as interactive mind maps for easier reading and navigation.