Verified Sep 2026

ActiveChromium engine 25/30 documented

Comet

Perplexity's Chromium browser built around an answer engine and an assistant that can carry out multi-step tasks in the page.

Published by Perplexity AI (United States) · Verified September 2026

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Runs on

macOSmacOS: Available
WindowsWindows: Available
LinuxLinux: Unknown
AndroidAndroid: Available
iOSiOS: Available

Choose it when

Choose Comet when you want an answer engine and an acting assistant as the primary way you browse, and you are comfortable being an early adopter.

Avoid it when

Avoid it for sensitive accounts or work, where an assistant with access to logged-in tabs is a larger attack surface than a conventional browser.

Quick answers

Read straight off the verified record - every one of these is expanded with its source below.

Which platforms does Comet run on?: Documented on macOS, Windows, Android, and iOS.
Can I install Chrome extensions?: Yes - the Chrome Web Store is supported.
Does it block trackers out of the box?: Not documented by the publisher. An ad blocker and tracker-blocking settings are documented; whether tracker blocking is on by default is not stated.
Does it have built-in AI features?: Yes - 7 of 9 documented AI capabilities are built in.
Is it open source?: Proprietary browser built on open-source Chromium
Is it still being developed?: Active - Actively developed, with desktop and mobile releases and rapidly changing capabilities.

What Comet does

Open any row for the wording and the source behind it

Privacy and tracking

1 built in · 1 not available · 2 undocumented

Blocks trackers by defaultBlocks trackers by default: Unknown
An ad blocker and tracker-blocking settings are documented; whether tracker blocking is on by default is not stated.
Anti-fingerprintingAnti-fingerprinting: Unknown
Telemetry postureTelemetry posture: Built in
Crash and performance diagnostics are documented as stripped of identifiers, with an opt-out under Privacy and security.
Built-in VPN or proxyBuilt-in VPN or proxy: Unavailable
Private windowsClosing incognito is documented as dropping history, cookies, form fills, and passwords, and as keeping the assistant from indexing that activity.
Closing incognito is documented as dropping history, cookies, form fills, and passwords, and as keeping the assistant from indexing that activity.
Default search enginePerplexity (Google on iOS)

Extensions and blocking

3 built in · 1 not available · 1 undocumented

Chrome Web StoreChrome Web Store: Supported
Firefox Add-onsFirefox Add-ons: Unsupported
Native content blockingNative content blocking: Built in
A built-in ad blocker is documented, with tracker and ad blocking adjustable in settings.
Manifest V3Manifest V3: Built in
Chromium extension support is documented.
Manifest V2Manifest V2: Unknown
Manifest V2 support is not documented separately from Chromium.
Known limitationsExtension support follows Chromium, but the vendor does not document manifest policy separately.
Extension support follows Chromium, but the vendor does not document manifest policy separately.

Workflow

6 built in · 4 not available · 1 undocumented

Vertical tabsVertical tabs: Unavailable
Tab treesTab trees: Unavailable
Workspaces or spacesWorkspaces or spaces: Unavailable
ProfilesProfiles: Built in
Profiles or equivalent browser identities are available.
Split viewSplit view: Built in
A split view mode is documented.
SidebarSidebar: Built in
An assistant sidebar is a core surface.
Reader modeReader mode: Unknown
Reader mode is not documented.
Command paletteCommand palette: Unavailable
Sync across devicesSync across devices: Built in
Passphrase-encrypted sync is documented for bookmarks, passwords, autofill, themes, history, extensions, and tabs.
TranslationTranslation: Built in
Page translation is documented.
Progressive web appsProgressive web apps: Built in
Progressive web apps are supported by the Chromium install flow.

AI features

7 built in · 2 undocumented

Built-in assistantBuilt-in assistant: Built in
The assistant is the browser's primary surface.
Page summarisationPage summarisation: Built in
Page and multi-tab summarisation are documented.
Acts on pages for youActs on pages for you: Built in
The assistant is documented as carrying out multi-step tasks in the page.
AI answer engineAI answer engine: Built in
Perplexity's answer engine is the default search path.
Works across open tabsWorks across open tabs: Built in
The assistant can act across open tabs.
Text or image generationText or image generation: Built in
Drafting and generation are documented.
Choice of modelChoice of model: Unknown
Model selection is not clearly documented.
Retention or training controlsRetention or training controls: Unknown
Retention and training controls are not clearly documented.
Voice or image inputVoice or image input: Built in
Voice Mode is documented on desktop, Android, and iOS.

On a phone

1 built in · 9 undocumented

Undocumented is not the same as absent - it means the publisher does not state it.

Extensions on mobileExtensions on mobile: Unknown
Extension support on mobile is not documented.
Can be the phone defaultCan be the phone default: Built in
Can be set as the platform default browser.
Biometric lockBiometric lock: Unknown
Biometric locking is not documented.
Offline readingOffline reading: Unknown
Offline reading is not documented.
Desktop-site modeDesktop-site mode: Unknown
Desktop-site mode is not documented.
Download managerDownload manager: Unknown
A built-in download manager is not documented.
Background playbackBackground playback: Unknown
Background or picture-in-picture playback is not documented.
Web pushWeb push: Unknown
Web push support is not documented.
Data saverData saver: Unknown
Address-bar placementAddress-bar placement: Unknown
Address-bar placement is not documented.

Under the hood

Rendering engine: Chromium
JavaScript engine: V8
Upstream project: Chromium
Release channel: stable
Code and licence: Proprietary browser built on open-source Chromium
Install method: Direct download from Perplexity or platform app store.
Hardware support: Desktop builds target current 64-bit hardware.

Source repository

Active. Actively developed, with desktop and mobile releases and rapidly changing capabilities.

Editorial view

Comet is Perplexity's attempt to make the answer engine the browser rather than a site you visit. It is built on Chromium, so pages render normally and Chrome extensions install, but the default search path resolves to Perplexity's synthesised answers and the assistant sits beside the page rather than behind a menu. Summarisation, drafting, cross-tab awareness, voice, and multi-step actions inside pages are all documented.

Platforms

Broad for a product this new: macOS, Windows, Android, and iOS, with Linux not clearly documented. On iOS the usual constraint applies, and it matters more here than usual because the assistant is the point: the App Store build renders with WebKit, and its default search is Google rather than Perplexity.

The capability worth thinking hardest about

Agentic action. An assistant that can navigate, click, and fill forms is operating inside sessions where you are already authenticated. That is a different security model from a browser that only renders pages. Attacks in this category, where instructions hidden in page content are read by the assistant as commands from you, have been publicly documented against agentic browsers including this one, and patched. Neither the attacks nor the defences are settled.

That is not an argument that the category is illegitimate. It is an argument for matching the tool to the material: research, comparisons, and long tab lists are a reasonable trade; your bank, your employer's admin console, and your email are not. The conservative split costs very little.

The privacy record

It has filled in since launch. Diagnostics are stripped of identifiers with an opt-out, an ad blocker is built in, and closing incognito drops history, cookies, form fills, and passwords while keeping the assistant from indexing that activity. Still unknown, and telling: whether tracker blocking is on by default, any fingerprinting posture, and the assistant's retention and training controls. For a product whose central feature reads your pages, that last gap is the one to watch.

The verdict

Choose Comet if you genuinely prefer answers to links and want an assistant that acts. Treat it as an early-adopter product, keep a conventional browser for sensitive sessions, and re-check the privacy fields as the vendor documents more.

Where these facts come from

Every capability above is read from a primary source and dated. 5 of 30 fields stay recorded as unknown rather than assumed.

Perplexity Comet official page
Product scope, platform availability, and assistant feature naming.
Verified Sep 2026

If this is not it

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Head to head

Reviewed comparisons featuring Comet

Comet vs Dia
Both put an assistant at the centre of the browser; Comet leans on Perplexity's answer engine, while Dia is closer to a writing and tab-context companion.
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