Firefox for Android suddenly using tons of data

All of a sudden, Firefox for Android has been using about 1GB of data daily. My Data Usage monitor says it is almost all Foreground data. I barely use Firefox for watching videos or streaming anything, especially when not on WiFi. I run two extensions — Privacy Badger and uBlock Origin, both of which I would assume should be saving me data by blocking ads and trackers. Data collection settings are set to Off. Autoplay is blocked for audio and video. Stories (sponsored or not) and sponsored Shortcuts are disabled. Tabs open for 2+ weeks are automatically moved to Inactive.