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Firefox kills network with chatter

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I'm running Neon 5.15 (Linux KDE desktop running on Ubuntu 18.4). I have been running Firefox Nightly. I reinstalled my OS due to a hard drive issue. Now Firefox sporadically fills my network with chatter, preventing other family members from being able to access the internet. I have: tried installing Kubuntu - same issue renaming .mozzilla and allowing Firefox to create a new profile allowing Sync to provide bookmarks, etc. - same issue disabled all addons: extensions, themes, plugins - same issue used standard version of Firefox - same issue

To ensure it's actually Firefox I've been using Chromium (open source version of Chrome) for the past 3 days and have had no issues. I'm using Firefox to write this but have had to close it 3 times due to network chatter.

Please help, I don't want to use Chromium, I want my Firefox back. I've been using it since version 0.5.

Chosen solution

It's been several days since I renamed the .mozilla directory and the issue has not returned. So it must have been something in that directory that copied from the bad hard drive, poorly. Consider this resolved.

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All Replies (2)

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I misstated 1 thing. I said that I renamed my .mozzilla directory. I didn't, I renamed my profile within that directory. Just now I renamed my .mozzilla directory. Waiting to see if that does any good.

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Chosen Solution

It's been several days since I renamed the .mozilla directory and the issue has not returned. So it must have been something in that directory that copied from the bad hard drive, poorly. Consider this resolved.