Tumblr is just flooding the blogs with loads of JS and CSS files. I don't know if these files are required or just useful. Here's a list of them
The JS: - tumblelog.js & pre_tumblelog.js -> looks like this is Tumblr JS API, but do we need it? - cedexis.radar.js -> no idea what this does. - rapid-3.18.1.js
The CSS:
- fonts/gibson/stylesheet.css
And some images are also added to the page.
I searched a bit, but there is no way of stopping tumblr from doing this. Is there any way we can stop Tumblr from doing so, if we don't need these files? If we need the scripts, can you please elaborate why we need these?
No, sadly you can't do anything to stop Tumblr adding scripts / style sheets as they are added serverside.
For reference, fonts/gibson/stylesheet.css is added in relation to the theme fonts option: https://www.tumblr.com/docs/en/custom_themes#theme-options
You might be able to break some of the scripts (for example by adding window.addEventListener = 1), but it's probably not be worth the hassle.
You can remove any extra CSS or element via javascript but any downloads initiated by them can't be prevented.
来源：https://stackoverflow.com/questions/30010406/stop-tumblr-from-adding-js-and-css-files-to-theme