B Evidence Grade B Graded accuracy verified by the review judge Safe to Cite Dated

22.5%

22.5% -- browser market share for Mozilla Firefox (2009)

Name: Browser Market Share Statistics
Creator: Lighthouse Intelligence
Published: 2026-09-16

2009 · Net Applications

Mozilla Firefox's browser market share reached 22.5%, up from 19.5%.

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Attribution: Net Applications View source

Lighthouse Research Team

Last verified: 2026-09-16 · How we verify data →

Source verified Evidence graded

Value

22.5%

Unit

Percentage

Data Vintage

2009

Entity

Mozilla Firefox

Geography

Global

Evidence Quality

Strong, reliable evidence

Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.

61/100 confidence

Single source - not yet corroborated

Score breakdown

Extraction

Source Trust

Citation Chain

Independence

Methodology

Freshness

Source

Net Applications Primary Tier B

http://www.exults.com/blog/mozilla-google-group-hugs-tricky ↗

Confidence: 53/100 Vintage: 2009 Channel: Common Crawl

Source Article

Blog

Original Research

Net Applications · Original study ↗

Methodology

Browser usage tracking by Net Applications; grew from 19.5%

Methodology documented

Trend Over Time

Period	Value	Change
2005	11.5%
2005	7%	-39.1%
2009 (current)	22.5%	+221.4%
2014	9.76%	-56.6%

Segmentation

IndustryTechnology RegionGlobal RoleAll marketers Channelcontent

Cite this stat

Plain Text

Mozilla Firefox: 22.5% browser market share. Source: Net Applications (2009). Via Lighthouse Intelligence -- https://lighthousedata.io/data/firefox-browser-market-share-2009

HTML Embed

<blockquote cite="https://lighthousedata.io/data/firefox-browser-market-share-2009" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>22.5%</strong> -- browser market share for Mozilla Firefox<br><small>Source: Net Applications (2009) · <a href="https://lighthousedata.io/data/firefox-browser-market-share-2009" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>

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