EasyTabs does not apply its own font styles (except for font size and colors set in the app settings). The app inherits fonts from your theme to match your store design.
If fonts appear different, the content likely contains hardcoded formatting. This usually happens when content is copied from other websites or pre-formatted documents. Shopify preserves that formatting when pasted into the editor.
To fix this, clear the formatting of the tab content and reapply styling directly in Shopify. We recommend pasting content as plain text and then formatting it inside the editor.
If you need assistance, please contact our support team at support@nexusmedia-ua.com, and we'll align the fonts using CSS for you.