Yes, you can use some browser extensions on a tablet, however, it depends on the browser you’re using and your operating system.
Firefox for Android supports a limited selection of add-ons, which can be installed from the Firefox Add-ons website. Microsoft Edge on Android also supports extensions available from the Microsoft Edge Add-ons store. Additionally, Safari on iPads running iOS 15 or later supports Safari extensions, which can be downloaded and managed via the App Store. However, you can’t install Chrome extensions on an iPad.