Hi

You can open the Firefox for Android browsing history and tap the "X" to remove a site from history.

I hope that this helps.

That only removes a single page from the history.

"Forget About This Site" not only removes all pages for the domain from history, but also all other associated data e.g. cache, passwords, cookies, 301 redirects, etc. It is frequently essential for development purposes.

Is there no equivalent in Firefox for Android?

At present that option is not available for Firefox for Android, but may be included in a future update.

In the meantime, you can install a pre-Release copy of the browser (either Beta or Nightly) from the Google Play store and clear the entire history without it impacting your normal browsing.

I can't believe this function is still not available. That's probably the most useful tool to manage history.