Where do I find iOS extensions

Firefox Extensions are only available for Firefox for Android and desktop Firefox on Windows, macOS, Linux. Due to Apple's restrictions the Firefox web browser on iOS/iPadOS uses Webkit and not Gecko. https://support.mozilla.org/en-US/kb/add-ons-firefox-ios Mozilla however has managed to get a ad block feature in Firefox for iOS/iPadOS. https://support.mozilla.org/en-US/kb/block-ads-firefox-ios https://blog.mozilla.org/en/firefox/ad-blocker-on-ios/