I don't think it's possible to answer your question based on a little snippet of style rules.

Could you explain what you mean by "listening files"?

hi and thanks for replying. i guess my concern is that within my laptop file directory under where i place personal files, i found a Safari directory with several .js files that run several commands - how can i interpret what these files are executing or reading?

You're asking about files that you found in a Safari folder, and you posted here with Safari. Do you even use Firefox?

Is this a download folder where you save files, or could it be a browser cache folder?

Web pages make extensive use of .js (JavaScript) files for everything from photo slide shows to managing shopping carts. It would be a huge project to read through them and try to sort out what they do. In fact, because .js files often are compressed it could be impossible for either of us to figure out.

I think if you are concerned about files lingering on your computer, you might want to use the feature of your browser to clear cached files (in Firefox, see: How to clear the Firefox cache; for Safari, you probably can find it on Apple's site) to see if the ones that concern you get removed automatically.

thank you