Adds Go built binaries to .gitignore

.gitignore

@@ -4,6 +4,8 @@ build/
 node_modules
 interfacer/target
 interfacer/vendor
+interfacer/interfacer
+interfacer/browsh
 interfacer/webextension.go
 webext/node_modules
 webext/dist

webext/test/integration/helper.js

@@ -152,7 +152,8 @@ class Helper {
     this.firefoxPTY.write(`cd ${dir} \r`);
     let command = `../node_modules/.bin/web-ext run ` +
       `--firefox="${this.project_root}/webext/contrib/firefoxheadless.sh" ` +
-      `--url https://google.com` +
+      `--verbose ` +
+      `--url https://google.com ` +
       `\r`;
     this.firefoxPTY.write(command);
     this.firefoxPTY.on('data', (data) => {