User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:5.0) Gecko/20100101 Firefox/5.0 Build Identifier: Mozilla/5.0 (Windows NT 5.1; rv:5.0) Gecko/20100101 Firefox/5.0 In FF4 during both moving and resizing tab groups the position / size "snapped in" when reaching the borders of another tab group. In FF5 this behaviour only applies to moving the group, not to resizing. Reproducible: Always Steps to Reproduce: 1. Have at leaste two tab groups 2a. Move one group - it snaps when coming across the borders of group two 2b. Resize it - no snapping here

Mozilla/5.0 (Windows NT 5.1; rv:7.0a1) Gecko/20110622 Firefox/7.0a1 Works for me, the groups in Panorama are "snapping in" when changing/resizing their position in Firefox 4, Firefox 5 or the latest Firefox nighly. Reporter, please can you confirm whether this issue still occurs using Firefox in safe mode and/or with a clean profile? http://support.mozilla.com/kb/Safe+Mode http://support.mozilla.com/kb/Basic+Troubleshooting#w_8-make-a-new-profile

Confirming the bug with both a new profile and in safe mode. Observed on two machines: 1. Windows 7 64 Bit 2. Windows XP 32 Bit To be precise on the version - it is the version of the latest auto-update, namely 5.0 as written in "About firefox".

I can confirm this also on Ubuntu 11.04 (x86). Note that this only occurs when using the corner resizer. It’s not an issue when the group is created initially by dragging in an empty space. Also, for some reason, this is not an issue in the latest nightly.