User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9) Gecko/2008051206 Firefox/3.0 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9) Gecko/2008051206 Firefox/3.0 When importing bookmarks from html file, or moving / deleting a folder which contains a lot of bookmarks, FF3 is accessing a lot the hard drive and it takes about 1 minute to complete the operation. In comparison FF2 performed the same operation in about 5 seconds, with only a few hard drive access. Issue was reported in bug 434917 but not in a very constructive way, that why I open a new bug. Reproducible: Always Steps to Reproduce: 1. Import html bookmark file, or move / delete a folder with many bookmarks inside 2. 3. Actual Results: operation ends after about 1 minute instead of few seconds in FF2 Expected Results: operation ends in few seconds with limited hard drive accesses Used computer is a Core 2 Duo 2GHz + 1GB RAM. Hard has been defragmented 2 days ago. FF3 has been installed in the same folder as FF2. Profile has been re-used from FF2. Installed and enabled Add-ons: Adblock Plus 0.7.5.4 All-in-One Gestures 0.18.0 (not FF3 compatible but runs with compatibility check disabled) Download Statusbar 0.9.6.1 DownloadHelper 3.0.3 IE tab 1.5.20080310 No Squint 1.93.2 (not FF3 compatible but runs with compatibility check disabled)

How large are these files? How many bookmarks are you talking about? Would you be willing to post your palces.sqlite file for inspection by a developer?