See comment in gnu/build/icecat-extension.scm.

--- a/toolkit/mozapps/extensions/internal/XPIDatabase.sys.mjs
+++ b/toolkit/mozapps/extensions/internal/XPIDatabase.sys.mjs
@@ -3753,6 +3753,7 @@
     if (
       newAddon ||
       oldAddon.updateDate != xpiState.mtime ||
+      oldAddon.path != xpiState.path ||
       (aUpdateCompatibility && this.isAppBundledLocation(installLocation)) ||
       // update addon metadata if the addon in bundled into
       // the omni jar and version or the resource URI pointing
