Browser extensions starting with M

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.

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.

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

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.

MailKing sends Gmail account and message-thread context to cloudHQ campaign endpoints.

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.

Manga Reader and Tracker - MangaPin sends matched manga page metadata to my.mangapin.com.

MarkDownload reads the active tab DOM and selection when you clip a page for local Markdown export.

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

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.

Meditation Search loads a remote S3 page each time you open its new-tab 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.

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

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.

Mini Mealie sends the active recipe URL and optional page HTML to your configured Mealie server.

Minyami reads streaming cookies and HLS keys on supported video sites to build local Minyami download commands.

Mobile Text Alerts for Gmail by cloudHQ sends Gmail alert details and phone numbers to cloudHQ during SMS setup.

Mokku exposes saved mock responses and header rules to any website through its page message bridge.

Monsta Wallet injects an all-site wallet provider bridge for page requests approved through its wallet middleware.

Moolah - Automatic Coupon Hunter adds a persistent Moolah client ID header to each top-level HTTP(S) page request.

Multi Skipper sends streaming profile details and continue-watching history from several services to external analytics endpoints.

MusicTab Default Search sends default search and suggestion queries to music-tab.com.

My Fpoly Extension disables development extensions and a fixed extension ID from pages on poly.edu.vn.

My Online Learning Downloader sends the page user object and current URL to its telemetry API when downloads start.

MyCoub loads a remote stylesheet on Coub pages and can send captured video frames to Yandex Images.

MyToDo sends new-tab search queries to goog.mylistodo.com with a fixed tracking ID.

MystNodes reads the local MystNodes API key and node telemetry from localhost into browser storage.

mirigana sends extracted Japanese page text to its online parser when that parser is enabled.

Mobile View Switcher rewrites the browser User-Agent header and page-reported User-Agent on every site.

MEGA Pass lets any website detect that the extension is installed through a content-script message probe.

Magicslide.app sends the active tab URL or selected page image to MagicSlides services when you use its toolbar actions.

Magnet Links rewrites magnet links to send clicked magnet URLs to Put.io or a user-selected handler.

Markdown Capturer - BibCit captures ChatGPT and Gemini assistant responses into local storage for export.

Math Equations Anywhere injects a math UI into the active page and loads React scripts from unpkg.com.

Math Tools writes user-triggered screenshots into the active page, where page scripts can read them.

Media Resources Enhancer caches Instagram and Threads media API responses in extension storage for downloads.

Meet Compute System Recovery Utility sends recovery-target and removable-drive details to Google Analytics when telemetry is enabled.

Curate, annotate, search, and discuss websites, PDFs, and YouTube videos for deep reading.