Get all 9 companies using ef.js
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Companies
9
Top Country
US
Top Industry
Automotive
Adoption Insights
ef.js is used by 9 companies in our database, representing approximately 0.00% of all tracked websites. The most common industry using ef.js is Automotive, and adoption is strongest in US.
Top Countries Using ef.js
Top Industries Using ef.js
Top Alternatives to ef.js
Other JavaScript frameworks technologies sorted by adoption
How We Detect ef.js
The Web Radar detects ef.js by analyzing HTTP headers, JavaScript variables, HTML source code, cookies, and DNS records across 3M+ websites. Our detection engine uses over 10,000+ pattern rules to ensure accurate identification. Browse all technologies →
Frequently Asked Questions
What is ef.js?+
ef.js is a JavaScript frameworks technology detected on 9 websites in our database.
How many companies use ef.js?+
9 companies in our database use ef.js, representing approximately 0.00% of all tracked websites.
What industries use ef.js the most?+
The top industries using ef.js are Automotive, B2B, Bioinformatics.
What countries use ef.js the most?+
The top countries using ef.js are US, BR, IT.
Is ef.js popular?+
ef.js is used by 9 companies, making it a notable JavaScript frameworks technology based on adoption across our tracked websites.
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Browse DatasetsData last updated: June 2026