Firefox for Android Support Forum

Today I was out of the house for a bit, and towards the end of it, I noticed that my phone was really hot. I checked the notifications, and android had given me an alert that my phone had used 7 GB of mobile data (the alarm is set to notify me for anything past 1GB). This was presumably in the space of slightly over an hour - while I wasn't even using the phone actively at all. according to android's "application data usage", all but 52 bytes of that was all foreground usage. But the thing is, I'm confused what even it was using that much data on - I don't think it could have been autoplaying videos, since I think the tab it was open to was something like reddit. I'm wanting to know what could have caused it to use that much data in that short a time without me actively doing things which are that data-intensive. Could it be something to do with the fact I had quite a few tabs open? are background tabs constantly requesting data or something? could it be some kind of virus? I'm honestly not sure, but I'd appreciate feedback so that this doesn't happen again. I'm also unsure if there's any way to generate a diagnostic report of the app, or anything like that, so if there is, please let me know.

HELP! My mobile data usage spiked as of June 20th and has continued at unprecedented levels almost every day since. My historic daily usage for the past many years has been around 4 MB and is now 95MB. and busting through my 2GB/month limit. This is ALL due to Firefox! What happened? Something strange happened on June 19th, when my mobile date usage recorded three separate usage figures instead of the single usage figure for all days previously. June 19th showed 2 usage figures and June 30th showed 3.