Top 4 Firefox Add-ons Competitors & Alternatives in 2026

Updated on 9/19/2025

Find more companies/brands/products like Firefox Add-ons. We've shortlisted leading alternatives and mapped their strengths, pricing, and go-to-market focus.

Firefox Add-ons

Best for consumers

Mozilla's official site for discovering and installing add-ons (extensions and themes) for the Firefox browser.

Competitors

#2

Microsoft Edge Add-ons

Best for consumers

Microsoft's official catalogue for Microsoft Edge browser extensions, published via Partner Center and listed on the Edge Add-ons site.
#4

Opera Add‑ons

Best for consumers

Opera's official directory for extensions and themes built for the Opera browser.
Featured

ChampSignal

Best for SMBs
Est. 2025 • 1 employee • Private

Get the insights your competitors don't want you to have. ChampSignal is a competitive intelligence suite for early-stage B2B SaaS founders. Make sharper calls on pricing, positioning, and GTM.

Starts at $39 / month

Has a free trial

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#5

Greasy Fork

Best for power users

Greasy Fork is an independent repository for user scripts (Greasemonkey/Tampermonkey) that let advanced users and developers customize website behavior and appearance.
#6

Crx4Chrome

Best for consumers

A third‑party repository and download site for Chrome extension CRX files that distributes extensions outside the official Chrome Web Store.

Market overlap

Asymmetric competition means that Firefox Add-ons is a competitor of these companies, but they are not necessarily competitors of Firefox Add-ons.

ChatGPT Themes

Best for power users
Est. 2025 • 1 employee • Private

Simple theme switcher extension offering curated palettes and easy theme switching for casual and power ChatGPT users.

Starts at $0
Promocipher

Free, open-source, zero-knowledge web app that securely stores and manages users' promo codes in a protected vault so they never lose discounts.

Starts at $0

Go Deeper

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Competitive Intelligence Report

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Pricing Fully Exposed

See exactly what competitors charge, their tiers, trials, and guarantees.

Feature Matrix: Build vs Skip

Table stakes every competitor has. Differentiators only 1-2 have.

Reviews You Can Use

Real quotes from G2, Capterra, Trustpilot, and TrustRadius. Ready for your site, demos, and positioning.

10 Competitors Mapped

Direct, indirect, and alternatives. Positioning, ICP, and differentiators.

SEO Gaps Worth Targeting

Keywords they rank for, you don't. With "Quick Win" tags.

Their Best-Performing Ads

Top-performing Google & Meta ads. Landing page screenshots with CTAs.

15+ Data Sources

APIs, LLMs, scrapers. Data ChatGPT can't access.