Hi

You mention in your question that you are using version 60 of Firefox for Android. That is an older version that is no longer supported.

Have you tried using the latest version of Firefox for Android available from the Google Play store?

I have a few questions about the storage space used by Firefox v60.00 on Android 6.0. Here is a picture of the storage space used up by Firefox on my phone Cache has been cleared. Data however is using up a large amount of space (1.3GB). uBlock origin version 1.16.6 is the only plugin/addon I have installed. I don't have any downloads. By comparison Chrome browser on my phone takes up less than 100MB of storage space. Questions What is a normal clean install size for firefox on Android ? What is deleted if I clear the 1.3GB of Data? Will my bookmarks be deleted. Will uBlock origin be deleted (my only installed plugin). How can I backup my bookmarks to a file? How do I determine what is using up all this storage space in Firefox, and prevent it from happening again? https://vshare.onl/ Thanks for your responses.

I got this,...

Have you tried using the latest version of Firefox for Android available from the Google Play store?