Disable any tracking when using a preview URL.#3354

emmerich wants to merge 1 commit intomainGitbookIO/gitbook:mainfrom

stevenh/rnd-7301-site-preview-iframes-inject-scripts-creating-false-visitorGitbookIO/gitbook:stevenh/rnd-7301-site-preview-iframes-inject-scripts-creating-false-visitorCopy head branch name to clipboard