Add-On “PrefBar” crashes SeaMonkey 2.52 ⚠️️

One of my favorite add-ons crashes latest SeaMonkey Trunk-Builds like

UNofficial (by FRG) en-US SeaMonkey 2.52a1 (NT 6.1; Win64; x64; rv:55.0) Gecko/20100101 Firefox/55.0 Build 20170513191754 (Default Classic Theme) on German WIN7 64bit

When I launch SeaMonkey it crashes immediately if PrefBar add-on is active.

The problem is not Win64; x64 related.

Bugs:

• Bug 1364078 – CRASH when launch with add-on PrefBar enabled
• mozillazine Bug 26367 – SM 2.52 latest Trunk Builds CRASH when launched with Premier enabled

Can someone confirm the problem❔

Any theory concerning the roots of the problem❔

New official SeaMonkey 2.52 Nightly Trunk builds

S e a M o n k e y y y    2.52   i i i n n   s i i i i g h h h h t ….

Only few time after the first new Firefox 55 Builds now SeaMonkey 2.52 Trunk builds are available for testing here — currently Linux and WINDOWS only!

Only for testing, you will use those builds on your own risk. I recommend to create a backup of your User Profile before you start testing those builds.