--- a/testing/marionette/interaction.js
+++ b/testing/marionette/interaction.js
@@ -282,16 +282,17 @@ interaction.selectOption = function(el) 
       el.selected = true;
     }
     event.input(containerEl);
     event.change(containerEl);
   }
 
   event.mouseup(containerEl);
   event.click(containerEl);
+  containerEl.blur();
 };
 
 /**
  * Clears the form control or the editable element, if required.
  *
  * Before clearing the element, it will attempt to scroll it into
  * view if it is not already in the viewport.  An error is raised
  * if the element cannot be brought into view.
@@ -493,16 +494,17 @@ interaction.uploadFile = async function(
   event.mousedown(el);
   el.focus();
   event.mouseup(el);
   event.click(el);
 
   el.mozSetFileArray(fs);
 
   event.change(el);
+  el.blur();
 };
 
 /**
  * Sets a form element's value.
  *
  * @param {DOMElement} el
  *     An form element, e.g. input, textarea, etc.
  * @param {string} value
@@ -569,16 +571,18 @@ async function webdriverSendKeysToElemen
   if (el.type == "file") {
     await interaction.uploadFile(el, value);
   } else if ((el.type == "date" || el.type == "time") &&
       Preferences.get("dom.forms.datetime")) {
     interaction.setFormControlValue(el, value);
   } else {
     event.sendKeysToElement(value, el, win);
   }
+
+  el.blur();
 }
 
 async function legacySendKeysToElement(el, value, a11y) {
   const win = getWindow(el);
 
   if (el.type == "file") {
     await interaction.uploadFile(el, value);
   } else if ((el.type == "date" || el.type == "time") &&