The possible actions achievable by injected JavaScript snippets are virtually endless. However, caution is advised, as running untrusted custom scriptlets may cause issues or even introduce some risk.

Two months ago, the company floated changes for Gitlab.com and proprietary software packages to include JavaScript snippets for third-party telemetry purposes.

The DoubleClick code is JavaScript snippets you can use anywhere within the body of your pages.

Before we get into adding persistence to our snippets application, let’s review my change to the log-in flow and introduce the basic snippet functionality I’ve added since last week.

Add browser functionality using JavaScript enabled bookmarks…without installing a plugin or extensions.