Who is Side View for?

Side View is an open-source project built for firefox users and web developers.

Does Side View have a free plan?

Yes — Side View is open source under the Open Source license and free to use.

What platforms does Side View run on?

Side View runs on the web, the command line, and embeddable surfaces.

Is Side View still active?

Unverified. Side View has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

Side View is developed by Mozilla, based in the United States.

When did Side View launch?

Side View first shipped in 2018.

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Side View

Name: Side View
Author: Mozilla

github.comInfrastructure🇺🇸

Side View is an open-source Firefox extension that opens web pages in a sidebar using a mobile-oriented view. It helps users browse or preview mobile layouts alongside the main page without switching tabs.

Open SourceWebCLIEmbeddable

Visit github.com

Overview

4 features

Side View is a Browser DevTools & extensions project. It focuses on viewing and comparing mobile versions of web pages without leaving the current browser tab. Side View is an open-source project aimed at firefox users and web developers. Side View is open source under the Open Source license. Side View is available on the web, the command line, and embeddable surfaces.

Behind Side View is Mozilla, based in the United States, and it first shipped in 2018. Among its 4 catalogued features are sidebar browsing, mobile page views, and split browsing.

Summary written by a language model from the project’s public pages.

Sidebar browsing
Mobile page views
Split browsing
Firefox integration

Built with & integrations

Connectors

chrome

Runs on

BrowserCLIEmbeddable

Trust & compliance

License

Open Source

Verified signals

HTTPSPrivacy Policy Terms of ServiceOpen SourceFree tierStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed8 Sept · 00:29 UTC
Side View verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Side View

What does Side View do?: Side View focuses on viewing and comparing mobile versions of web pages without leaving the current browser tab. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is Side View for?: Side View is an open-source project built for firefox users and web developers.
Does Side View have a free plan?: Yes — Side View is open source under the Open Source license and free to use.
What platforms does Side View run on?: Side View runs on the web, the command line, and embeddable surfaces.
Is Side View still active?: Unverified. Side View has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
Who makes Side View?: Side View is developed by Mozilla, based in the United States.
When did Side View launch?: Side View first shipped in 2018.
Is Side View open source?: Yes — Side View is open source under the Open Source license.

At a glance

Pricing: Open Source
Platforms: Web · CLI
Languages: English
License: Open Source
First seen: 8 Sept 2026
Built for: Firefox users and web developers
Model: Open source
Solves: Viewing and comparing mobile versions of web pages without leaving the current browser tab.

Registered as

Firefox Add-ons: side-view

Developer

🇺🇸Mozilla

Index record

Indexed: 8 Sept 2026
Lifecycle: Alive
First seen: Sept 2026
Last seen: 8 Sept 2026

Identity audit (13)

Slug: side-view-github-com
Lifecycle last checked: 8 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 8 Sept 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Written by a language model from the project's public pages.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 8 Sept 2026
Canonical URL: https://github.com/mozilla/side-view

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