Browser extensions starting with O

This extension lets you play the OvO platformer game in Chrome.

SPOI Options fetches a patch manifest from lazlo.spoi.com and can load vendor-specified CSS into video pages.

Shows Open Source China update news and navigation tools on each new tab page.

This extension provides an offline electronic Oxford Advanced Learner’s Dictionary 7th Edition for Chrome.

Obsidian AI Exporter sends selected AI chat pages to the user's local Obsidian REST API.

This extension saves a Sina Weibo user’s public posts as local HTML files for offline viewing.

Downloads Weibo photo albums in bulk from the Weibo home page or a personal profile.

This extension provides a collection of games that can be played without an internet connection.

Shows Wikimedia pages with the legacy Vector layout by adding the useskin=vector parameter.

OnePageCRM Lead Clipper sends profile URLs, emails, or phone numbers from supported pages to OnePageCRM contact lookup.

Adds a playful Oneko cat companion that follows your cursor while you browse.

Online Piano can send extension-page session usage telemetry to accounts.api.extensions.ee.

Listen to internet radio stations from the Chrome toolbar with background playback.

The extension sends supported shopping page URLs to onual.com for price-history display.

View and edit Excel spreadsheets directly in Chrome without Microsoft Excel.

This extension opens clicked file:// links to local files in a new Chrome tab.

Opens Slack links in Chrome instead of launching the Slack desktop app.

Open links and selected content in a small popup window without leaving the current page.

Open PDF and DOC links in a chosen Google Doc Viewer.

OpenL Translate sends translation requests to api.openl.io with hardcoded API secrets bundled in the extension.

Opinew Shopify Reviews Importer sends Shopify shop owner details to Segment analytics from supported pages.

This extension launches the Optimize Next editor tool to implement and edit test patterns.

Manages XRP Ledger accounts and payments from a browser wallet.

Osprey: Browser Protection sends checked page URLs to alphaMountain and Seclookup for security filtering.

Our Mouse Gesture lets page-dispatched mouse events trigger tab, window, and history actions through the extension.

Builds advanced Google searches with filters for sites, file types, dates, regions, languages, and other operators.

Ozon Stats imports its popup font stylesheet from Google Fonts when the popup opens.

This extension helps send text, images, and reactions with selectable sounds and bubble sizes.

Automatically downloads osu! beatmaps from both the old and new osu! sites.

Adds a “Read on Europresse” option to supported subscriber-only news articles.

Open With sends the selected page or link URL to its local native helper when you use its open-with actions.

This extension uses browser settings to open bookmarks in a new tab.

Displays regional flags and score ranking information on official osu! website profiles.

OCR Scanner Extension sends user-selected page screenshots to its Cloud Run OCR service with a stable user ID.

Adds a download button for currently playing ORF Radiothek and ORF radio-page audio contributions.

Imports building materials from supplier product pages into Obat quotes, invoices, or item libraries.

Octohint sends package names from code-host pages to jsDelivr to look up TypeScript definitions.

This extension generates AI review insights from Amazon product pages, product URLs, keywords, ASINs, and uploaded review files.

This extension sends entered barcodes to help test the Odoo Barcode app without a scanner or printed labels.

Ogame Fast expeditions fetches and runs remote code from kds-tools.com on OGame game and lobby pages.

Ojjina sends address-bar searches, suggestions, and new-tab search queries to ojjina.com.

Replaces the current Roblox logo with the 2018–2022 version on most Roblox websites.

Omni Convert redirects default omnibox search queries to find.madmidas.net monetized results.

The extension sends active-tab URL, page title, headings, and extracted page text to backend.onpageseo.ai for AI metadata generation.

Clear selected browsing data with a single click.

This extension replaces the new tab page with a One Piece live wallpaper and productivity widgets.

One Piece Wallpaper sends precise browser geolocation to OpenWeatherMap for its new-tab weather widget.

Applies audio compression to videos so dialogue and loud sounds play at more even volume levels.

One-Click Trello sends the active tab title, URL, selected text, and image URL to Trello when you create a card.

Creates interactive ancestor and pedigree lists from supported genealogy tree pages.

Highlights one line of text on webpages to help readers keep their place.

This extension provides quick access to SAP Concur travel and expense management services.

This extension opens Microsoft Outlook .msg email files and lets users view message contents and attachments.

This extension scans QR codes from web pages, image files, and a webcam.

This extension provides a simple in-browser text editor for writing and saving notes while browsing.

Plays the Roblox “Oof” sound when you close a tab.

Open Prompt Manager places saved prompt titles, contents, and tags into the page DOM on permitted sites.

Adds a button to open Steam web pages in the Steam desktop client.

Open in Yandex Browser sends user-selected page, link, or tab URLs to its local native messaging host.

Downloads playable videos from the Sora website with a download button.