Browser extensions starting with O
244 browser extension security reviews, listed by name.
Office - Enable Copy and Paste
Microsoft Corporation
CleanEnables cut, copy, and paste menus in Office on the web.
Okta Browser Plugin
Okta, Inc.
CleanOkta Browser Plugin provides enterprise SSO and sends opt-in usage telemetry to Pendo analytics.
OpenText Content Server
OpenText Corporation
MediumContent Server Browser Web Extension exposes two unscoped bridges that allow any webpage to invoke OpenText native desktop applications.
OneTab
OneTab
CleanConverts open tabs into a restorable list to reduce the number of active browser tabs.
OKX Wallet
OKX
CleanOKX Wallet sends every tab navigation URL to an OKX anti-phishing API along with persistent device fingerprint identifiers.
Obsidian Web Clipper
Obsidian
CleanSave web pages, selections, highlights, and metadata to an Obsidian vault as Markdown.
OneLogin
OneLogin, Inc.
LowOneLogin for Google Chrome fetches and executes JavaScript functions from app.onelogin.com on every website the user visits.
Open Multiple URLs
tp
CleanOpens a pasted list of website addresses in separate tabs.
OneDrive
Microsoft Corporation
CleanAccess, share, and sync OneDrive files across your devices and browser.
OceanHero
OceanHero GmbH · Art & Design
MediumTurns web searches and new tabs into support for ocean plastic cleanup projects.
OpenDyslexic for Chrome
OpenDyslexic · Education
CleanReplaces webpage fonts with OpenDyslexic to make online text easier to read.
OP Auto Clicker
mousetool
CleanAutomates mouse clicks at the cursor or a preset location on supported web pages.
Online Voice Recorder
123apps.com
CleanRecords sound from your microphone, then lets you trim and save the recording to your computer.
Open URLs
vpChar · Workflow & Planning
CleanOpen multiple URLs at once in separate tabs or windows.
Open in VLC™ media player
yokris.dev · Entertainment
CleanThis extension sends selected online video and audio links to VLC media player.
OCR Image Reader
brian.girko
CleanThis extension captures a selected screen region and runs OCR to extract text from it.
Octotree
Ovity
CleanOctotree renders its account password field as plain text in its GitHub sidebar login form.
Omega Ad Blocker
adblockeromega · Tools
CleanOmega Ad Blocker fetches remote rules that can inject scriptlets and CSS across websites.
Omnibug
Philip Lawrence
CleanOmnibug captures matching marketing-request URLs and POST data for tabs where its DevTools panel is open.
Open SEO Stats
OpenAdminTools.com
LowOpen SEO Stats sends the active tab's host and SEO history to history.openadmintools.com when the popup opens.
Open incognito tab
cswprodev · Privacy & Security
MediumOpen incognito tab sends feedback messages and the active tab URL to Telegram.
Operata
Operata
CleanCollects call, system, network, and headset diagnostics for cloud contact center monitoring.

Browsing Protection by F-Secure
F-Secure
CleanBrowsing Protection by F-Secure sends every visited URL and open tab list to a locally-installed F-Secure native host for real-time scanning.

OneTab
OneTab Team
CleanOneTab sends saved tab domains to Google's favicon service when it renders tab icons in the OneTab interface.
Open Adblocker
openadblockerdeveloper · Workflow & Planning
HighOdoo Debug
Droggol · Developer Tools
CleanToggle Odoo debug mode from the browser toolbar or keyboard shortcuts.
Old Layout for Facebook
ModernKit.one · Social & Communication
CleanThis extension changes the new Facebook layout to use older Facebook-style colors.
Outreach Everywhere
Outreach
CleanAdds Outreach communication tools for Gmail and Salesforce calling and emailing.
OneClick Cleaner
Smart Software
CleanCleans Chrome browsing data such as cache, history, downloads list, cookies, form data, and saved passwords.
Onelog
Info Technology Supply Ltd
HighOnline speech recognition
Simple Seo Solutions · Accessibility
CleanThis extension adds speech input to web text fields and clipboard workflows.
ORGanizer for Salesforce
Enrico Murru
CleanStores Salesforce account details and helps identify and open Salesforce org tabs quickly.
OfficeWork
RedcoolMedia · Workflow & Planning
CriticalOmniSearch
omnisearch
CleanThis extension redirects searches from the browser omnibox to Yahoo Search.
Online Photo Tool
saveimageastype
CleanOnline Photo Tool maintains a hidden pinned Google tab to silently perform keyword searches and click target URLs on behalf of paying clients.
Open site in removepaywall
ImageVars
CleanOpen site in removepaywall sends the current tab's full URL to removepaywall.com when you click its menu item or toolbar icon.
Otto: Pomodoro timer & Website Blocker. Block sites, Focus mindfully
J. Benjamin · Workflow & Planning
CleanThis extension provides a Pomodoro focus timer with website blocking during focus sessions or scheduled hours.
ordbogen.com
Ordbogen A/S · Education
CleanLook up selected words on ordbogen.com from Chrome.

Okta Browser Plugin
Okta Inc.
CleanOkta Browser Plugin sends analytics telemetry to third-party services, gated behind org settings and user consent.
Off The Record History
dutiyesh · Workflow & Planning
CleanOff The Record History sends a persistent extension UID and usage events to Google Analytics.
Online Privacy
Joan Long
CleanThis extension manages privacy-related browser settings and changes default search to privacyonlinesearch.com.
OpenOffice Writer
officeonlinesystems · Workflow & Planning
CriticalOptimAI Lite Node
OptimAI Network
MediumOptimAI Lite Node collects device fingerprints and reports uptime to api.optimai.network every 10–15 minutes in exchange for passive-income rewards.
Orbital Daggers
Onionfist Studio
HighOrbital Daggers injects server-controlled HTML into its popup from fn.onionfist.com and exposes extension storage to onionfist.com pages.
Outlier
Remotask
CleanOutlier Assistant helps contributors complete AI labeling tasks on Google DataCompute by sending task data and queue events to app.outlier.ai.
Outsurf
Peter Molacek
LowOutsurf downloads shortcut rules from outsurf.net and redirects matching Google searches to configured destinations.
OP_WALLET
opnet
MediumOP_WALLET sends a persistent device ID and Bitcoin wallet address to its servers on every browser start.
OceanHero
OceanHero GmbH
MediumOceanHero reads signed-in Google accounts and top-visited sites, and forwards your user ID to an ad network on every new tab.
Omnimed-QHR authenticator
developpementOmnimed
LowOmnimed-QHR authenticator forwards messages from Omnimed web pages to a local smartcard signing app without validating the request.
Open In IINA
lhc70000
CleanOpen links, videos, and audio from Chrome in the IINA media player.
Open in Foxit™ Reader
lunu.bounir
MediumOpen in Foxit™ Reader passes web-origin PDF URLs to a native shell command without sanitization when a custom Foxit path is configured.
OpenShot
officeonlinesystems
HighOKIOCAM Live
https://www.okiolabs.com
MediumOKIOCAM Live sets uploaded Google Drive files to public 'anyone with link' sharing without user confirmation.
OWASP PTK
pentestkit.co.uk · Developer Tools
MediumOWASP Penetration Testing Kit accepts page bridge messages that send saved DAST scan results to the configured PTK portal.
Oalur - Amazon Products&Traffic Research Tool
itsupport
HighObservePoint Debugger
ObservePoint · Developer Tools
CleanObservePoint Debugger captures the URL, query string and POST body of requests on tabs you debug and sends them to ObservePoint.
Omnidoc, la plateforme de téléexpertise
pierre
CleanOmnidoc relays commands from omnidoc.fr pages to a local native host without a command allowlist.
One-click image downloader - Grabit
Grabit Team · Art & Design
LowOne-click image downloader - Grabit sends opt-in usage analytics, including domain names, to its vendor backend tied to a persistent device identifier.
Open Access Button
Open Access Button
CleanFinds legal access options for research articles when you cannot access them.
one sec
riedel.wtf GmbH
Lowone sec intercepts tab navigation to configured websites and displays a friction screen before the user can continue.