Koberstein

This plugin adds an option under ‘General Settings’ for you to put your donation Bitcoin address. It places this address in hidden meta tags in the head section of your site. This allows your site’s Bitcoin address to be detected by browser extensions that allow visitors to make donations or microtips to your website.

Bitcoin Meta Tags

Subodh Ghulaxe

This plugin adds .html extension to pages in WordPress. Adding .html extension on posts is easy as it can be updated from permalinks, but by default it is not possible on pages.
Useful in following cases:
<ul>
<li>You want to convert your static site to WordPress but don’t want to change .html extension in URLs.</li>
<li>Want to append .html extension to end of all page in WordPress.</li>
<li>You already added .html to post URLs and want to keep similar URL structure.</li>
</ul>

Add .html Extension to Pages

Working perfectly with WordPress 5.7

A simple and easy way to add .html extension to WordPress pages.

Bitcoin Meta Tags vs Add .html Extension to Pages