We recommend installing fs.js in the <head> of your page for maximum recording and playback fidelity. When the script is further down in the page it may take a little bit longer for it to start recording, depending upon whether there are blocking resources earlier in the page. Depending on how your site is set up and what other scripts you have running, you may miss a second or two at the beginning of your sessions.
For more on how we load our script, check out this article.
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