Manually add or edit entries in mobile browser’s local storage [migrated]

I want to manually (not programmatically) add or edit an entry in a mobile (Android) browser’s local storage. I know how to do that on a Desktop browser and I know how to programmatically do that cross-platform. Is there any mobile browser that would let me do that? If so, how? It’s OK if the answer requires downloading an extension and/or another app.