(unlikely the right component but not sure what would be the right one) I logged in on a website using LastPass and I saw a banner at the bottom of the page saying that LastPass was slowing down Nightly. The banner didn't say how nor allowed my to look into details. I thought maybe someone will have a look if I file a bug :) Application Basics ------------------ Name: Firefox Version: 54.0a1 Build ID: 20170204110423 Update Channel: nightly User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:54.0) Gecko/20100101 Firefox/54.0 OS: Linux 4.4.0-59-generic Multiprocess Windows: 3/3 (Enabled by default) Safe Mode: false

It seems to be a known problem https://bugzilla.mozilla.org/show_bug.cgi?id=1332692#c20 related with e10s without a solution yet