If you enable this setting, IE Tab will check the current page for beforeunload or onbeforeunload event handlers before unloading the page.
If you disable this setting, IE Tab will not invoke beforeunload before unloading the page. For legacy reasons this setting is disabled by default.
| Registry Hive | HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER |
| Registry Path | Software\Policies\IE Tab\IE Tab |
| Value Name | BeforeUnload |
| Value Type | REG_DWORD |
| Enabled Value | 1 |
| Disabled Value | 0 |