In the collectData() function, the field cliBaseDownloadURL now uses the element's placeholder as a fallback if the value is empty. This prevents users from clearing the setting (e.g., to revert to an environment-controlled default or to unset a custom URL). When a user deletes the input and blurs the field, the hardcoded placeholder string is saved to preferences instead of an empty string. The cross-file context HTMLSettingsPreferencePage.java shows that this value is persisted directly; thus, the UI will permanently show the 'default' string as a hardcoded value on subsequent reloads even if the user intended to leave it empty.

The repositionTooltip function attempts to measure the popup's dimensions and position using getBoundingClientRect() on line 394 while the element is still display: none (per the CSS on line 229). In standard browser engines, including the WebKit/WebView2 engines used by Eclipse, calling this method on a hidden element returns zero for all properties. Consequently, the overflow checks for rect.top, rect.right, and rect.left will always evaluate to false, making the viewport-aware repositioning logic effectively a no-op.