LeadsBlue Email Finder scans the current tab on demand to find publicly visible email addresses in page text and mailto links. Results can be copied or exported as CSV. Includes a Pattern Helper to generate likely corporate formats from first/last name + domain. What it does

One-click Scan Current Page
Finds emails in visible text + mailto: links
Copy All or Export CSV quickly
Pattern Helper: firstname.lastname@domain, f.lastname@domain, etc.
Get Full List at LeadsBlue (opens https://leadsblue.com/)

Designed for compliance & privacy

Minimal permissions: activeTab, scripting
No data collected; everything runs locally in your browser
Scanning is disabled on major social networks (e.g., LinkedIn, Facebook, Instagram, X/Twitter, TikTok, Reddit)

Notes

Works on standard web pages; some special pages (PDFs, reader modes, internal browser pages) may not allow script injection.
This add-on does not verify or enrich emails. For ready-made lists, click “Get Full List at LeadsBlue”.

Permissions

activeTab: temporary access to the tab you explicitly click
scripting: injects a one-time script to read visible text and links