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Logging of the number of blocked sites causing constant HDD noises in permanent PBM · Issue #3100 · uBlockOrigin/uBlock-issues · GitHub

• I verified that this is not a filter list issue. Report any issues with filter lists or broken website functionality in the uAssets issue tracker.
• This is NOT a YouTube, Facebook or Twitch report. These sites MUST be reported by clicking their respective links.
• This is not a support issue or a question. For support, questions, or help, visit /r/uBlockOrigin.
• I performed a cursory search of the issue tracker to avoid opening a duplicate issue.
• The issue is not present after disabling uBO in the browser.
• I checked the documentation to understand that the issue I am reporting is not normal behavior.

• uBO is the only extension.
• uBO uses default lists and settings.
• using a new, unmodified browser profile.

It is probably the same issue Adblock Plus was affected years ago ( https://gitlab.com/adblockinc/ext/adblockplus/adblockplusui/-/issues/899 ) and today I even suspect my HDD might be SMR capable which might explain this even more.

Even when automatic filter list updates are disabled to rule this out as a cause and visiting a website that causes uBlock Origin to block anything (so the counter for the number of blocked sites goes up) I see in Windows's resource monitor (can be opened from the task manager) I/O activities in Firefox's profile folder under \storage\default\moz-extension*\idb*.sqlite .

The I/O activities continue even when doing nothing on the website and in my test it was sufficient to go to https://www.youtube.com , clicking reject all in the eventual appearing cookie/privacy banner and then just watching Windows's resource monitor for a few minutes.

I'm not sure I fully agree with Adblock Plus on their chosen solution to just not log the number of blocked entries anymore as I don't think this is too problematic information here (as long as no URL's are logged as well, which I assume uBlock Origin took already care of). If possible it might be sufficient for (permanent) PBM sessions to just keep the new numbers in memory and save them before uBlock Origin unloads (e.g. the user closes Firefox).

1. Enable permanent private browsing mode in Firefox.
2. Disable automatic filter list updates in uBlock Origin.
3. Go to https://www.youtube.com and reject all in the cookie/privacy banner if it appears.
4. Open Windows's resource monitor (e.g. via the task manager).
5. In Windows's resource monitor filter for all occurrences of firefox.exe.
6. Wait a bit (5-10 minutes) and look at the I/O activity.

I/O activities from logging should not happen (or only once at the end) when (permanent) PBM is used.

Disk activities can be seen in Firefox's profile on \storage\default\moz-extension*\idb*.sqlite (matching the generated ID of uBlock Origin in the path) that occur initially when opening the website and then indefinitely every 1-3 minutes resulting in significant increased noises on HDD's.

1.55.0

Firefox 122.0

Windows 10 22H2 64 bit

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