Browser extensions starting with O

CROSSx lets any HTTPS page switch the wallet's active chain through its injected page bridge.

Adds a DevTools tab for browsing a web app’s Origin Private File System.

Obsidian Clipper sends selected page content, the page title, and URL to jplattel.github.io when you clip a page.

Official Card Counter Trello with Totalizer redirects visits to shopping sites through affiliate links.

Offline QR Code Generator sends the active tab URL to QR-shortener endpoints when making a code by default.

Oink for Influencers mirrors saved API keys and account identifiers into page localStorage on Amazon-related pages.

This extension restores YouTube’s pre-2025 player UI and adds optional interface cleanup tweaks.

One-Click Video Downloader sends the active tab URL to its video lookup API when the popup checks for downloadable video.

This extension switches your browser to use a Tor proxy when your computer is already connected to Tor.

Onion's Revenge loads a news panel from fn.onionfist.com and inserts the returned HTML into its popup.

Online AntiVirus Protection sends visited page URLs and referrers to analytics.chromeapps.site with a persistent UUID.

This extension generates a QR code for the current page address.

Listen to radio stations directly in the browser.

Online Search sends typed new-tab search terms to onlinesearchtool.org for suggestions and search.

Opens page frames or iframes in the current tab, a new tab, a new window, or an incognito window.

Opens a pasted or imported list of URLs in separate browser tabs.

Adds downloadable or custom subtitles to HTML5 videos on streaming sites.

Open Two-Factor Authenticator stores TOTP secrets in sync storage using password-hash AES encryption.

Open audio files in iTunes from Chrome’s right-click context menu.

Open the current tab, links, or all tabs in Brave Browser from your current browser.

Opens selected addresses in Google Maps from the browser toolbar.

Open in IE™ sends the current URL to a user-configured executable via a native host that evaluates a child_process spawn script.

Opens selected website links in Microsoft Edge from the right-click menu.

Opens Notion share links in the Notion desktop app on Mac OS and Windows.

Open file links from supported code hosting sites directly in Visual Studio Code.

Open compressed file links with WinZip from the browser right-click menu.

This extension adds a right-click option to open APK files with the Bluestacks emulator.

This extension opens documents, spreadsheets, and presentations with Google Docs.

Open with VLC opens the current page or selected media URL through the local vlc:// protocol handler.

Open-Deck sends draft X post text to opd.kwdev-sys.com when users click its text review button.

OpenAI Redirector reads corporate device and user identity via a native messaging helper and sends it to OpenAI's own analytics backend.

OpenMask lets a page supply the dApp origin used for wallet authorization checks.

OpenTabs sends new-tab search terms and its click_id cookie to p.opentabs.org.

OptimAI forwards user-approved X/Twitter cookies and OptimAI tokens to its local native host.

Shows the number of cards in each Trello list.

Ostendo sends YouTube feature-use events with a persistent extension client ID to Google Analytics.

Shows Twitch streamers’ revenue rankings next to their names.

Outliner CSS loads a Google-hosted font stylesheet when its popup opens.

Outliner re-fetches the current page and replaces it with cleaned HTML when you click it or enable auto mode.

Overprice sends page URLs to overprice.app and can return server-directed page content extractions.

Look up selected text in Oxford Learner’s Dictionaries from the right-click menu.

oWebster Search sets owebsearch.com as the browser's default search provider and sends omnibox searches there.

Provides a simple HTML interface for using Ollama.

Look up selected words on ordbogen.com from Chrome.

OGame UI++ uploads shared OGame account and resource summary screenshots to Imgur.

Toggles Google Meet’s self-view between mirrored and non-mirrored video.

ONTO Wallet forwards wallet RPC requests from page frames to the extension as the top-level site.

OZONBIGSELL modifies Ozon seller analytics pages to return Premium Plus access and synthetic analytics data.

OnThisDayTab sends new-tab search terms and typed URLs to ext.iadispatcher.com.

One Piece Gear 5 Wallpaper sends your Chrome Top Sites URLs to Google's favicon service on each new tab.

Measures angles on screen with a movable, resizable, and rotatable virtual protractor.

This extension automatically opens clicked links in new tabs when enabled.

Open Online Office Files opens selected document links through Google Docs Viewer or Microsoft Office Online Viewer.

Open in GIMP fetches and downloads a native-client installer from GitHub Releases without verifying its integrity.

Opens local file and folder paths in Windows Explorer from Chrome.

Connects Oryx Dental Software with third-party imaging applications.

Owl devtools lets any webpage ask the extension to open its Owl documentation tab.

Select a region of the current page and convert visible text in it with offline OCR.

This extension opens links in new tabs according to configurable link-opening settings.