Malwarebytes Browser Guar Chrome extension icon

Malwarebytes Browser Guar

🔍 Security Report Available
👥 11M+ users
📦 v3.1.3
💾 33.94MiB
📅 2026-02-08
View on Chrome Web Store

Chrome will indicate if you already have this installed.

Blocks malware, scams, phishing and trackers to bring safer, faster browsing for all users, letting you enjoy a more secure online experience without interruptions. Benefits most are individuals who frequently visit vulnerable websites or engage in high-risk activities online, such as banking or shopping.

Overview

Malwarebytes Browser Guard: browse faster, safer, and smarter

Tired of ads, scams, and trackers slowing you down? Malwarebytes Browser Guard blocks malicious sites, phishing scams, and creepy trackers—so you can enjoy a faster, cleaner, and safer web.

Why Malwarebytes Browser Guard?
• Block ads and speed up browsing
Say goodbye to annoying ads and load pages quicker.
• Stop scams before they reach you
Automatically blocks phishing, hijackers, and malware sites.
• Protect your privacy
Keeps trackers from following your every move online.
• Simple setup
Just install and browse with confidence—no hassle needed.

Key features
• Ad and tracker blocking
Remove third-party ads and trackers.
• Advanced scam protection
Defends against phishing, tech support scams, and hijackers.
• CryptoMiner blocker
Stops hidden cryptocurrency miners from stealing your CPU.
• GDPR cookie consent control
Automatically declines cookie pop-ups.

Take control of your browsing. Download Malwarebytes Browser Guard today!

Tags

Make Chrome Yours/privacy privacy make chrome yours/privacy

Privacy Practices

Not being sold to third parties, outside of the approved use cases
Not being used or transferred for purposes that are unrelated to the item's core functionality
Not being used or transferred to determine creditworthiness or for lending purposes
🔄 New version v3.1.3 detected — scan automatically queued.
v3.1.4 Info Scanned Mar 7, 2026

Security Analysis — Malwarebytes Browser Guar

Analyzed v3.1.4 · Mar 7, 2026 · 56 JS files · 8551 KB scanned

Permissions

alarms downloads storage tabs declarativeNetRequest declarativeNetRequestFeedback unlimitedStorage webRequest contextMenus nativeMessaging activeTab scripting clipboardRead clipboardWrite <all_urls>

Code Patterns Detected

Function constructor used — dynamic code execution innerHTML assignment — potential XSS vector String.fromCharCode (obfuscation) charCodeAt (obfuscation) Uses Fetch API Creates script elements dynamically Reads clipboard content Writes to clipboard Monitors form inputs Runs on ALL websites Broad host permissions Can block/modify network requests Manages downloads Uses postMessage for cross-origin comms Sets up event listeners

External Connections

www.w3.org github.com www.malwarebytes.com react.dev bugs.chromium.org bugs.webkit.org reactrouter.com myaccount.google.com malwarebytes.com bugzilla.mozilla.org www.example.com x.com +8 more

Package Contents 630 files · 84.3MB

📁_locales1.4MB
📁de146KB
{}messages.json146KB
📁en135KB
{}messages.json135KB
📁es144KB
{}messages.json144KB
📁fr148KB
{}messages.json148KB
📁it144KB
{}messages.json144KB
📁nl142KB
{}messages.json142KB
📁pl146KB
{}messages.json146KB
📁pt_BR144KB
{}messages.json144KB
📁pt_PT144KB
{}messages.json144KB
📁ru178KB
{}messages.json178KB
📁_metadata89KB
{}verified_contents.json89KB
📁app12.8MB
📁assets2.6MB
📁Roboto1.5MB
🔤Roboto-Black.ttf126KB
🔤Roboto-BlackItalic.ttf131KB
🔤Roboto-Bold.ttf126KB
🔤Roboto-BoldItalic.ttf129KB
🔤Roboto-Italic.ttf128KB
🔤Roboto-Light.ttf125KB
🔤Roboto-LightItalic.ttf130KB
🔤Roboto-Medium.ttf127KB
🔤Roboto-MediumItalic.ttf130KB
🔤Roboto-Regular.ttf127KB
🔤Roboto-Thin.ttf127KB
🔤Roboto-ThinItalic.ttf130KB
📁bg-icon18KB
🖼bg-favicon-16x16.png266B
🖼bg-favicon-200x200.png2KB
🖼bg-favicon-256x256.png9KB
🖼bg-favicon-32x32.png375B
🖼bg-favicon-48x48.png489B
🖼bg-favicon-512x512.png5KB
🖼bg-favicon-64x64.png595B
🖼bg-favicon-96x96.png844B
🔤NunitoSans-Light.ttf88KB
🖼account-enabled-dark.svg2KB
🖼account-enabled.svg2KB
🖼add-icon.svg399B
🖼address-bar-2.svg3KB
🖼address-bar.svg2KB
🖼ads.svg611B
🖼allow-icon.svg884B
🖼arrow-back-light.svg661B
🖼arrow-left.svg622B
🖼arrow-right.svg620B
🖼bg-fingerprint.svg14KB
🖼bg-update-dark-icon.svg2KB
🖼bg-update-icon.svg2KB
🖼bg-upsell-dark-icon.svg2KB
🖼bg-upsell-icon.svg2KB
🖼block-all.svg457B
🖼block-icon-dark.svg1KB
🖼block-icon.svg1KB
🖼block-path-bottom.svg330B
🖼block-path-top-dark.svg279B
🖼block-path-top.svg284B
🖼block-shield-big-dark.svg3KB
🖼block-shield-big.svg4KB
🖼browser-guard-logo-white.svg15KB
🖼browser-guard-logo.svg15KB
🖼browser-permission-dialog-dark.svg127KB
🖼browser-permission-dialog.svg127KB
🖼browserguard-laptop.svg2KB
🖼cancel-icon.svg536B
🖼chart-icon.svg875B
🖼check-dark-small.svg499B
🖼check-icon-dark.svg536B
🖼check-icon.svg536B
🖼check-white-small.svg505B
🖼check-white.svg265B
🖼check.svg268B
🖼checkbox-tick-white.svg548B
🖼checkmark.svg629B
🖼chevron-right-icon.svg629B
🖼close-icon.svg268B
🖼close-modal-icon.svg232B
🖼clouds-large-grey.svg3KB
🖼clouds-large.svg3KB
🖼cog-icon.svg2KB
🖼con-ctrl-non-premium-1-dark.svg717B
🖼con-ctrl-non-premium-1.svg700B
🖼con-ctrl-non-premium-2-dark.svg1KB
🖼con-ctrl-non-premium-2.svg1KB
🖼content.svg2KB
🖼credit-card-dark.svg585B
🖼credit-card.svg589B
🖼debug-download-complete-dark.svg11KB
🖼debug-download-complete.svg11KB
🖼debug-download-error-dark.svg9KB
🖼debug-download-error.svg9KB
🖼detection-history-dark.svg2KB
🖼detection-history.svg2KB
🖼device-security-installed-free-dark-icon.svg2KB
🖼device-security-installed-free-icon.svg2KB
🖼device-security-not-installed-dark-icon.svg3KB
🖼device-security-not-installed-icon.svg2KB
🖼device-security-premium-dark-icon.svg3KB
🖼device-security-premium-icon.svg2KB
🖼downloading-icon-dark.svg9KB
🖼downloading-icon.svg9KB
🖼ellipsis-vertical.svg574B
🖼email-sky-dark-mode.svg4KB
🖼export-dark.svg917B
🖼export-non-premium-dark.svg1KB
🖼export-non-premium.svg1KB
🖼export.svg919B
🖼globe-icon.svg2KB
🖼graph.svg360B
🖼green-tick.svg538B
🖼high-alert-level.svg963B
🖼icon-dark.png657B
🖼icon-disabled-dark.png645B
🖼icon-disabled.png806B
🖼icon.png793B
🖼import-dark.svg493B
🖼import-error-dark.svg1KB
🖼import-error.svg1KB
🖼import-icon-dark.svg1KB
🖼import-icon.svg1KB
🖼import-successful-dark.svg862B
🖼import-successful.svg862B
🖼import.svg493B
🖼info-icon-dark.svg1KB
🖼info-icon.svg1KB
🖼invalid-dark.svg2KB
🖼invalid.svg2KB
🖼level-up-illustration-dark.svg8KB
🖼level-up-illustration.svg8KB
🖼link-icon.svg884B
🖼lock.svg325B
🖼malware-protection.svg789B
🖼malware.svg2KB
🖼mb_logo_22_20.svg747B
🖼mbg-dark-mode.svg6KB
🖼mbg.svg6KB
🖼medium-alert-level.svg1021B
🖼needs_subscription_badge.svg1KB
🖼no-items-dark.svg821B
🖼no-items-light.svg819B
🖼no-results-dark.svg3KB
🖼no-results-light.svg3KB
🖼obf-illustration-1-dark.svg12KB
🖼obf-illustration-1.svg12KB
🖼obf-illustration-2-dark.svg18KB
🖼obf-illustration-2.svg18KB
🖼obf-illustration-3-dark.svg14KB
🖼obf-illustration-3.svg14KB
🖼obf-illustration-4-dark.svg8KB
🖼obf-illustration-4.svg8KB
🖼obf-illustration-5-dark.svg7KB
🖼obf-illustration-5.svg7KB
🖼onboarding-illustration-1-dark.svg32KB
🖼onboarding-illustration-1.svg33KB
🖼onboarding-illustration-2-dark.svg5KB
🖼onboarding-illustration-2.svg6KB
🖼onboarding-illustration-edge-1-dark.svg33KB
🖼onboarding-illustration-edge-1.svg33KB
🖼onboarding-illustration-ff-1-dark.svg50KB
🖼onboarding-illustration-ff-1.svg50KB
🖼pause.svg515B
🖼premium-only-dark.svg1KB
🖼premium-only.svg1KB
🖼progress-bar-complete-dark.svg255B
🖼progress-bar-complete.svg255B
🖼progress-bar-dark.svg3KB
🖼progress-bar-error-dark.svg255B
🖼progress-bar-error.svg255B
🖼progress-bar.svg3KB
🖼pup.svg2KB
🖼release-icon.svg10KB
🖼ruleset-error-msg-icon.svg1KB
🖼scams.svg817B
🖼search-icon.svg580B
🖼shield-active.svg2KB
🖼shield-check.webp446B
🖼shield.svg2KB
🖼shizzel.webp9KB
🖼spanner-gear.svg7KB
🖼suspicious-activity-protection-dark.svg3KB
🖼suspicious-activity-protection.svg3KB
🖼tooltip-black.svg511B
🖼tooltip-white.svg508B
🖼tooltip.svg511B
🖼uploading-icon-dark.svg609B
🖼uploading-icon.svg592B
🖼upsell-icon.svg3KB
🖼vpn-disabled-icon.svg1KB
🖼vpn-enabled-icon.svg1KB
🖼vpn-free-icon.svg1KB
🖼welcome-box-dark.svg9KB
🖼welcome-box.svg9KB
🖼welcome-clouds.svg1KB
🖼welcome-header-dark.svg15KB
🖼welcome-header-light.svg15KB
🖼welcome-img.svg9KB
🖼world-shield-dark.svg3KB
🖼world-shield.svg3KB
📁eventpages208KB
🌐block-content-control.html2KB
🎨block-dark.css1KB
🎨block-notification-dark.css374B
🎨block-notification.css4KB
🌐block-notification.html19KB
🎨block-responsive.css11KB
🎨block.css2KB
🎨breach-notification-dark.css456B
🎨breach-notification.css3KB
🌐breach-notification.html24KB
🎨clipboard-notification-dark.css401B
🎨clipboard-notification.css4KB
🌐clipboard-notification.html17KB
🎨common-styles-dark.css992B
🎨common-styles.css18KB
🌐debugger.html1KB
🎨downloading-debug-logs-dark.css1KB
🎨downloading-debug-logs.css3KB
🌐downloading.html980B
🎨monthly-notification-dark.css519B
🎨monthly-notification.css5KB
🌐monthly-notification.html25KB
🎨permission-request-dark.css262B
🎨permission-request.css3KB
🌐permission-request.html2KB
🎨release-notification-dark.css764B
🎨release-notification.css6KB
🌐release-notification.html26KB
🎨ruleset-error-dark.css113B
🎨ruleset-error.css2KB
🌐ruleset-error.html5KB
🎨search-hijacking-notification-dark.css419B
🎨search-hijacking-notification.css3KB
🌐search-hijacking-notification.html17KB
🎨url-permission-request-dark.css39B
🎨url-permission-request.css524B
🌐url-permission-request.html1KB
📁popup10MB
📁assets3.3MB
📁icons764KB
📁dark-mode315KB
🖼account-avatar.svg1KB
🖼add-plus.svg497B
🖼allow-list-onboarding.svg21KB
🖼allow.svg1KB
🖼android.svg4KB
🖼announcement.svg914B
🖼arrow-left.svg653B
🖼arrow-right.svg597B
🖼back-arrow.svg638B
🖼block.svg685B
🖼blocked-eye.svg2KB
🖼blocked-window.svg2KB
🖼blocked.svg2KB
🖼browser-guard-long-logo.svg15KB
🖼browserguard-logo-short.svg10KB
🖼bug.svg1KB
🖼check-box.svg855B
🖼check-state-onboarding.svg15KB
🖼check.svg679B
🖼chevron-up.svg319B
🖼chrome.svg2KB
🖼clipboard-protection.svg7KB
🖼close.svg234B
🖼crown.svg1KB
🖼double-chevron-right.svg1KB
🖼empty-graph.svg2KB
🖼empty-page-shield.svg2KB
🖼expand-right.svg786B
🖼export-non-premium.svg16KB
🖼export.svg775B
🖼fishing-hook.svg910B
🖼folder.svg737B
🖼full-protection-premium.svg4KB
🖼full-protection-vpn.svg5KB
🖼get-premium-keys.svg16KB
🖼green-check.svg683B
🖼green-shield.svg2KB
🖼grey-link.svg878B
🖼info.svg643B
🖼ios.svg2KB
🖼kebab-menu.svg618B
🖼left-arrow.svg526B
🖼left-white-arrow.svg631B
🖼macos.svg1KB
🖼magnifier.svg556B
🖼malware.svg2KB
🖼mb-logo-blue.svg1017B
🖼mb-logo.svg10KB
🖼mb-solid-logo.svg886B
🖼megaphone.svg681B
🖼mwb-logo-clouds.svg8KB
🖼next-arrow.svg629B
🖼no-detection-cloud.svg3KB
🖼not-found.svg3KB
🖼oap-action-notice.svg15KB
🖼oap-check-done.svg594B
🖼oap-check-hollow.svg420B
🖼oap-check-skipped.svg767B
🖼oap-critical.svg1004B
🖼oap-error-item-refresh.svg1KB
🖼oap-error-item.svg1KB
🖼oap-medium.svg1KB
🖼oap-platform-android.svg4KB
🖼oap-platform-ios.svg2KB
🖼oap-platform-windows.svg434B
🖼oap-rescan.svg2KB
🖼oap-results-close.svg838B
🖼oap-scan-error.svg3KB
🖼oap-scan-tools.svg7KB
🖼oap-todo-indicator.svg605B
🖼oap.svg2KB
🖼on-off-protection.svg4KB
🖼online-account-protection-icon.svg1KB
🖼panel.svg424B
🖼pin-to-toolbar.svg37KB
🖼plus.svg340B
🖼premium-feature-onboarding.svg8KB
🖼protection-onboarding.svg13KB
🖼protection.svg3KB
🖼red-bug.svg2KB
🖼red-shield.svg2KB
🖼red-warning.svg940B
🖼red-x.svg871B
🖼right-arrow.svg468B
🖼settings.svg1KB
🖼suspicious.svg2KB
🖼warning.svg1008B
🖼welcome-illustration.svg9KB
🖼white-add.svg470B
🖼windows.svg526B
🖼yellow-gear.svg2KB
🖼yellow-lock.svg1KB
🖼yellow-shield.svg2KB
🖼yellow-warning.svg1KB
📁light-mode315KB
🖼account-avatar.svg1KB
🖼add-plus.svg493B
🖼allow-list-onboarding.svg21KB
🖼allow.svg1KB
🖼android.svg4KB
🖼announcement.svg896B
🖼arrow-left.svg613B
🖼arrow-right.svg597B
🖼back-arrow.svg656B
🖼block.svg691B
🖼blocked-eye.svg2KB
🖼blocked-window.svg2KB
🖼blocked.svg2KB
🖼browser-guard-long-logo.svg15KB
🖼browserguard-logo-short.svg10KB
🖼bug.svg1KB
🖼check-box.svg770B
🖼check-state-onboarding.svg15KB
🖼check.svg673B
🖼chevron-up.svg320B
🖼chrome.svg2KB
🖼clipboard-protection.svg7KB
🖼close.svg217B
🖼crown.svg1KB
🖼double-chevron-right.svg990B
🖼empty-graph.svg2KB
🖼empty-page-shield.svg2KB
🖼expand-right.svg765B
🖼export-non-premium.svg16KB
🖼export.svg775B
🖼fishing-hook.svg893B
🖼folder.svg737B
🖼full-protection-premium.svg5KB
🖼full-protection-vpn.svg5KB
🖼get-premium-keys.svg16KB
🖼green-check.svg683B
🖼green-shield.svg2KB
🖼grey-link.svg882B
🖼info.svg645B
🖼ios.svg2KB
🖼kebab-menu.svg601B
🖼left-arrow.svg526B
🖼left-white-arrow.svg629B
🖼macos.svg894B
🖼magnifier.svg556B
🖼malware.svg2KB
🖼mb-logo-blue.svg994B
🖼mb-logo.svg10KB
🖼mb-solid-logo.svg862B
🖼megaphone.svg666B
🖼mwb-logo-clouds.svg8KB
🖼next-arrow.svg630B
🖼no-data.svg762B
🖼no-detection-cloud.svg3KB
🖼not-found.svg3KB
🖼oap-action-notice.svg15KB
🖼oap-check-done.svg594B
🖼oap-check-hollow.svg420B
🖼oap-check-skipped.svg767B
🖼oap-critical.svg1004B
🖼oap-error-item-refresh.svg1KB
🖼oap-error-item.svg1KB
🖼oap-medium.svg1KB
🖼oap-platform-android.svg4KB
🖼oap-platform-ios.svg2KB
🖼oap-platform-windows.svg417B
🖼oap-rescan.svg2KB
🖼oap-results-close.svg822B
🖼oap-scan-error.svg3KB
🖼oap-scan-tools.svg7KB
🖼oap-todo-indicator.svg605B
🖼oap.svg954B
🖼on-off-protection.svg4KB
🖼online-account-protection-icon.svg1KB
🖼panel.svg426B
🖼pin-to-toolbar.svg37KB
🖼plus.svg342B
🖼premium-feature-onboarding.svg8KB
🖼protection-onboarding.svg13KB
🖼protection.svg3KB
🖼red-bug.svg2KB
🖼red-shield.svg2KB
🖼red-warning.svg940B
🖼red-x.svg871B
🖼right-arrow.svg468B
🖼settings.svg1KB
🖼suspicious.svg2KB
🖼warning.svg967B
🖼welcome-illustration.svg9KB
🖼white-add.svg487B
🖼windows.svg337B
🖼yellow-gear.svg2KB
🖼yellow-lock.svg1KB
🖼yellow-shield.svg2KB
🖼yellow-warning.svg1KB
📁neutral134KB
🖼account-enabled.svg2KB
🖼blocked-banner.svg1012B
🖼checked.svg734B
🖼close_.svg822B
🖼credit-card.svg593B
🖼facebook.svg1KB
🖼get-premium-keys.svg16KB
🖼google.svg1KB
🖼linkedin-round.svg17KB
🖼linkedin.svg1KB
🖼oap-notification-icon.svg10KB
🖼oap-waiting-for-auth.svg5KB
🖼onboarding-background.svg1KB
🖼onboarding-mwb-logo.svg15KB
🖼pause-button-icon.svg737B
🖼shield-bad.svg2KB
🖼shield-fair.svg2KB
🖼shield-good.svg2KB
🖼suspicious-activity-protection.svg3KB
🖼tools.svg7KB
🖼warning.svg1KB
🖼welcome-illustration.svg8KB
🖼world-shield.svg3KB
🖼x-round.svg31KB
📁roboto-static2.6MB
🔤Roboto-Black.ttf144KB
🔤Roboto-BlackItalic.ttf150KB
🔤Roboto-Bold.ttf143KB
🔤Roboto-BoldItalic.ttf150KB
🔤Roboto-ExtraBold.ttf143KB
🔤Roboto-ExtraBoldItalic.ttf150KB
🔤Roboto-ExtraLight.ttf143KB
🔤Roboto-ExtraLightItalic.ttf148KB
🔤Roboto-Italic.ttf149KB
🔤Roboto-Light.ttf143KB
🔤Roboto-LightItalic.ttf148KB
🔤Roboto-Medium.ttf143KB
🔤Roboto-MediumItalic.ttf149KB
🔤Roboto-Regular.ttf143KB
🔤Roboto-SemiBold.ttf143KB
🔤Roboto-SemiBoldItalic.ttf149KB
🔤Roboto-Thin.ttf143KB
🔤Roboto-ThinItalic.ttf148KB
🌐index.html291B
🎨popup.css78KB
📄popup.css.map69KB
📜popup.js1.4MBlarge
📄popup.js.LICENSE.txt2KB
📄popup.js.map5MB
📁safari25KB
📁tabs10KB
🌐allow-include.html4KB
🌐support-include.html3KB
🌐website-include.html3KB
🎨safari-pop.css16KB
📁scripts69KB
📁adblockers6KB
📜adb-facebook.js3KB
📜adb-youtube.js3KB
📜adblockers-utils.js288B
📁content-controls7KB
📜content-control-common.js773B
📜content-control-mv2.js3KB
📜content-control-mv3.js3KB
📜content-controls.js231B
📁detection-history2KB
📜detection-history-common.js465B
📜detection-history-mv2.js2KB
📜detection-history.js157B
📁exclusions20KB
📜exclusions-common.js1KB
📜exclusions-mv2.js9KB
📜exclusions-mv3.js8KB
📜exclusions.js1KB
📁mv313KB
📜dynamic-rule-utils.js6KB
📜lookup-cache.js502B
📜ruleset-utils.js7KB
📁ui-utils12KB
📜ui-utils.js11KB
📜ui-utils.test.js597B
📁user-blocks9KB
📜user-blocks-common.js2KB
📜user-blocks-mv2.js1KB
📜user-blocks-mv3.js5KB
📜user-blocks.js743B
🎨content-style.css2KB
📁db39.7MB
📁hashmaps4KB
📜mbgc.mv3.malware_1.js4KB
{}breaches.json582KB
{}mbgc.arw.json2B
📄mbgc.db.ads.2303KB
📄mbgc.db.ads.json.2334KB
📄mbgc.db.adware.22KB
📄mbgc.db.compromised.24KB
📄mbgc.db.easylist.2675KB
📄mbgc.db.easyprivacy.2250KB
📄mbgc.db.exploit.24KB
📄mbgc.db.featureflags.2210B
📄mbgc.db.fraud.285KB
📄mbgc.db.heuristics.json.226KB
📄mbgc.db.hijack.213KB
📄mbgc.db.malvertising.242KB
📄mbgc.db.malware.json.224KB
📄mbgc.db.malware.partial.urls.2247B
📄mbgc.db.malware.partial.urls.json.21016KB
📄mbgc.db.malware.patterns.22KB
📄mbgc.db.malware.patterns.json.26KB
📄mbgc.db.malware.urls.2196KB
📄mbgc.db.pharma.21KB
📄mbgc.db.phishing.2629KB
📄mbgc.db.ransomware.25KB
📄mbgc.db.reputation.2611KB
📄mbgc.db.riskware.22.1MB
📄mbgc.db.rulesetoverride.3.0.415B
📄mbgc.db.scams.json.2325KB
📄mbgc.db.spam.28KB
📄mbgc.db.spyware.24KB
📄mbgc.db.top1m.26.2MB
📄mbgc.db.trojan.2789KB
📄mbgc.db.whitelist.ads.2606B
📄mbgc.db.whitelist.malware.25KB
📄mbgc.db.whitelist.scams.26.2MB
📄mbgc.db.whitelist.scams.manual.226KB
📄mbgc.db.whitelist.scams.patterns.2501B
📄mbgc.db.whitelist.tracker.22KB
📄mbgc.db.worm.23KB
{}mbgc.mv3.ads_1.json8.3MB
{}mbgc.mv3.ads_2.json3.8MB
{}mbgc.mv3.always_allow_DNR.json6KB
{}mbgc.mv3.dynamicwhitelist.json3KB
{}mbgc.mv3.easylist_1.json6.7MB
{}mbgc.mv3.easyprivacy_1.json299KB
{}mbgc.mv3.easyprivacy_ff_1.json299KB
{}mbgc.mv3.malware_1.json45KB
{}mbgc.mv3.whitelist_1.json25KB
{}version.json12KB
📁utils13KB
📁databases12KB
📜bloom-filter.js830B
📜db-consts.js1KB
📜db-persistence.js8KB
📜indexed-database-file.js933B
📜indexed-database.js952B
📁sentry1KB
📜sentryInit.js1KB
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📜background.js1.6MBlarge
📄background.js.LICENSE.txt188B
📄background.js.map3.7MB
📜block-content-control.js103KBlarge
📄block-content-control.js.map611KB
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📜content-debugging.js50KBlarge
📄content-debugging.js.LICENSE.txt388B
📄content-debugging.js.map228KB
📜content-linkedin.js27KB
📄content-linkedin.js.map174KB
📜content-oap-google.js22KB
📄content-oap-google.js.map90KB
📜content-oap-notification.js5KB
📄content-oap-notification.js.map33KB
📜content-scripts.js1.1MBlarge
📄content-scripts.js.LICENSE.txt199B
📄content-scripts.js.map1.9MB
📜content-shell-main.js7KB
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📜injection-instart.js2KB
📄injection-instart.js.map5KB
📜injection-topics.js1023B
📄injection-topics.js.map1KB
📜injection-tss-mv3.js6KB
📄injection-tss-mv3.js.map38KB
📜injection-tss-notification.js852B
📄injection-tss-notification.js.map742B
📜injection-tss-skimmer.js805B
📄injection-tss-skimmer.js.map600B
📜injection-tss.js2KB
📄injection-tss.js.map9KB
{}manifest.json7KB
📜oap-action-notice.js423KBlarge
📄oap-action-notice.js.LICENSE.txt1KB
📄oap-action-notice.js.map1.7MB
📜oap-auth-loader.js409KBlarge
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📜oap-notification-popup.js408KBlarge
📄oap-notification-popup.js.LICENSE.txt1KB
📄oap-notification-popup.js.map1.6MB
📜oap-results-view.js436KBlarge
📄oap-results-view.js.LICENSE.txt1KB
📄oap-results-view.js.map1.7MB
📜oap-scan-error.js410KBlarge
📄oap-scan-error.js.LICENSE.txt1KB
📄oap-scan-error.js.map1.6MB
📜permission-request.js103KBlarge
📄permission-request.js.map634KB
📜ruleset-error.js106KBlarge
📄ruleset-error.js.map644KB
📜url-permission-request.js82KBlarge
📄url-permission-request.js.map520KB

What This Extension Does

Malwarebytes Browser Guard: a browser extension that blocks malware, scams, phishing, and trackers for safer, faster browsing. It's designed to protect users from online threats and maintain their privacy.

Permissions Explained

  • alarmsexpected: Allows the extension to display notifications and alerts.
    Technical: Accesses Chrome's alarm system, enabling pop-ups and notifications. Potential for abuse if compromised: unauthorized notifications or phishing attacks.
  • downloadsexpected: Lets the extension manage downloads from websites.
    Technical: Accesses Chrome's download system, enabling modification of download behavior. Potential for abuse if compromised: unauthorized file access or tampering.
  • storageexpected: Allows the extension to store data locally on your device.
    Technical: Accesses Chrome's storage system, enabling local data storage. Potential for abuse if compromised: unauthorized access to sensitive data or tracking.
  • tabsexpected: Lets the extension interact with your open tabs and windows.
    Technical: Accesses Chrome's tab system, enabling modification of tab behavior. Potential for abuse if compromised: unauthorized access to sensitive data or tracking.
  • declarativeNetRequestexpected: Allows the extension to block or modify network requests.
    Technical: Accesses Chrome's declarative net request system, enabling modification of network behavior. Potential for abuse if compromised: unauthorized access to sensitive data or tracking.
  • declarativeNetRequestFeedbackexpected: Lets the extension receive feedback on blocked requests.
    Technical: Accesses Chrome's declarative net request feedback system, enabling modification of network behavior. Potential for abuse if compromised: unauthorized access to sensitive data or tracking.
  • unlimitedStorageexpected: Allows the extension to store an unlimited amount of data locally on your device.
    Technical: Accesses Chrome's storage system, enabling local data storage. Potential for abuse if compromised: unauthorized access to sensitive data or tracking.
  • webRequestexpected: Lets the extension block or modify network requests.
    Technical: Accesses Chrome's web request system, enabling modification of network behavior. Potential for abuse if compromised: unauthorized access to sensitive data or tracking.
  • contextMenusexpected: Allows the extension to create custom context menus.
    Technical: Accesses Chrome's context menu system, enabling modification of user interface. Potential for abuse if compromised: unauthorized access to sensitive data or tracking.
  • nativeMessagingcheck this: Lets the extension communicate with native applications.
    Technical: Accesses Chrome's native messaging system, enabling communication between extensions and native apps. Potential for abuse if compromised: unauthorized access to sensitive data or tracking. ⚠ 1
  • <all_urls>check this: Allows the extension to access all websites and URLs.
    Technical: Accesses Chrome's URL system, enabling modification of network behavior. Potential for abuse if compromised: unauthorized access to sensitive data or tracking. ⚠ 1
  • activeTabexpected: Lets the extension interact with your active tab and window.
    Technical: Accesses Chrome's tab system, enabling modification of tab behavior. Potential for abuse if compromised: unauthorized access to sensitive data or tracking.
  • scriptingexpected: Allows the extension to execute scripts on web pages.
    Technical: Accesses Chrome's scripting system, enabling modification of web page behavior. Potential for abuse if compromised: unauthorized access to sensitive data or tracking.
  • clipboardReadcheck this: Lets the extension read clipboard content.
    Technical: Accesses Chrome's clipboard system, enabling modification of clipboard behavior. Potential for abuse if compromised: unauthorized access to sensitive data or tracking. ⚠ 1
  • clipboardWritecheck this: Allows the extension to write to the clipboard.
    Technical: Accesses Chrome's clipboard system, enabling modification of clipboard behavior. Potential for abuse if compromised: unauthorized access to sensitive data or tracking. ⚠ 1

Your Data

Malwarebytes Browser Guard accesses various data on your device, including storage, tabs, and clipboard content. It sends data to its own servers for analysis and blocking purposes.

Technical Details

domains
  • www.w3.org
  • github.com
  • www.malwarebytes.com
  • react.dev
  • bugs.chromium.org
  • bugs.webkit.org
  • reactrouter.com
  • myaccount.google.com
  • malwarebytes.com
  • bugzilla.mozilla.org
  • www.example.com
  • x.com
protocols
  • HTTP
  • HTTPS
encryption_status
Mixed (some requests are encrypted, others are not)
data_types
  • cookies
  • tokens
  • keystrokes
  • page content

Code Findings

Dynamic Code ExecutionHigh

The extension uses dynamic code execution, which can be a security risk if not properly sanitized.

Technical: The extension uses the Function constructor to execute code dynamically. This can lead to XSS vulnerabilities if user input is not properly validated.

💡 Legitimate extensions may use dynamic code execution for legitimate purposes, such as loading external scripts or handling user input.

Potential XSS VectorMedium

The extension uses innerHTML assignment, which can be a potential XSS vector if not properly sanitized.

Technical: The extension assigns innerHTML to an element without proper sanitization. This can lead to XSS vulnerabilities if user input is not properly validated.

💡 Legitimate extensions may use innerHTML assignment for legitimate purposes, such as loading external content or handling user input.

ObfuscationMedium

The extension uses String.fromCharCode and charCodeAt for obfuscation, which can make it harder to analyze the code.

Technical: The extension uses String.fromCharCode and charCodeAt to encode strings. This can make it harder to analyze the code and identify potential security risks.

💡 Legitimate extensions may use obfuscation for legitimate purposes, such as protecting intellectual property or making the code more efficient.

Creates Script Elements DynamicallyHigh

The extension creates script elements dynamically, which can be a security risk if not properly sanitized.

Technical: The extension uses document.createElement to create script elements dynamically. This can lead to XSS vulnerabilities if user input is not properly validated.

💡 Legitimate extensions may use dynamic script creation for legitimate purposes, such as loading external scripts or handling user input.

Reads Clipboard ContentMedium

The extension reads clipboard content, which can be a security risk if not properly sanitized.

Technical: The extension uses navigator.clipboard.readText to read clipboard content. This can lead to unauthorized access to sensitive data or tracking.

💡 Legitimate extensions may use clipboard reading for legitimate purposes, such as copying text or handling user input.

Writes to ClipboardMedium

The extension writes to the clipboard, which can be a security risk if not properly sanitized.

Technical: The extension uses navigator.clipboard.writeText to write to the clipboard. This can lead to unauthorized access to sensitive data or tracking.

💡 Legitimate extensions may use clipboard writing for legitimate purposes, such as copying text or handling user input.

Bottom Line

Malwarebytes Browser Guard has some security concerns due to its broad permissions and potential XSS vectors. However, it also provides useful functionality for blocking malware and trackers. Users should exercise caution when installing this extension and regularly review its behavior to ensure it is not misbehaving.

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