Questions after installation - Tabs & Paths

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I can understand security concerns over referencing remote files, but it's not unusual for CMS themes to pull in libraries like Jquery or components of frameworks such as Bootstrap or Foundation from a CDN or repository so that they are always up-to-date. This is regardless of the particular CMS being used. Frameworks like Foundation and Bootstrap also break their CSS into a set of modules each for a particular purpose rather than one large file.