
Your mobile browser’s background tab restoring is quietly leaking your daily routine. Here is why I switched my setup.
Hey everyone!
I recently noticed something slightly creepy while looking at the self-hosted, anonymous analytics (Umami) of my personal blog. I was getting weird, synchronized spikes of traffic at very specific times of the day from the same regions.
It turns out that mobile (and some desktop) browsers, in an attempt to save memory, suspend old forgotten tabs. When you open your browser app, it anticipates you and restores them in the background, sending a ping to the server.
This seemingly harmless memory-saving feature is basically broadcasting your sleep schedule, your working hours, and your daily habits to every single website you left open weeks or months ago. And while my self-hosted Umami doesn't trace the original user, other big platforms and trackers definitely use this for Browser Fingerprinting.
This realization got me thinking a lot about metadata leakage and how our browsers handle background tasks. I ended up writing a post on my blog reflecting on this issue and explaining why I've decided to start using Tor Browser for my everyday, casual surfing to mitigate this specific type of tracking.
You can read my full thoughts here: https://mestik78.com/en/blog/2026/06/28/metadatos-y-tor/
Has anyone else noticed this kind of background telemetry from modern browsers? What browser do you currently use for casual, non-authenticated browsing on your phone to prevent this?