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up vote 0 down vote favorite I don't know if this is any kind of virus, but lately i've been seeing stuff that i did not add to my browser, at first i thought thoses were code added to my webpages but now i see them on all webpages (including this one). this is the javascript added: <script type="application/x-javascript" src="http://i.swebdpjs.info/opt_content.js?v=opt_1410177193622&amp;partner=sweb&amp;channel=sweb&amp;sset=2&amp;appTitle=&amp;sset=2&amp;ip=190.199.222.1"></script>

there are more added but this one is an example, i cannot tell which one are from stackoverflow but i recognize this one because it appears on every page. i analyzed my pc with nod32 and it does not find any virus threat and analyzed with CCleaner any way to fix this? javascript firefox browser virus
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  this question asked Sep 26 '14 at 16:32 nosthertus 798 3 14 35 closed as off-topic by Piskvor, squint, Adriano Repetti, Huangism, Ryan Kempt Sep 26 '14 at 19:32 This question appears to be off-topic. The users who voted to close gave this specific reason: "Questions about general computing hardware and software are off-topic for Stack Overflow unless they directly involve tools used primarily for programming. You may be able to get help on Super User." – Piskvor, squint, Adriano Repetti, Huangism, Ryan Kempt If this question can be reworded to fit the rules in the help center, please edit the question. 2   I don't think this is the proper forum for your question. SO is for coding specific questions. I'm going to flag for this to be moved to Super User where more general computing questions can be addressed. –  Shaded Sep 26 '14 at 16:35 1   Do you have any extensions/plugins enabled in your browser that might be adding this? Does it happen in all your browsers? –  j08691 Sep 26 '14 at 16:35

up vote 1 down vote ---Accepted---Accepted---Accepted---

Check your browser extensions and add-ons. It's possible one of those is injecting this Javascript into every page. Also try opening your browser in Incognito mode to see if it happens then. Browser extensions and add-ons are disabled during incognito (or private browsing) mode. It is also possible that your ISP is inserting this into every page. In wich case we could do other things to stop this behavior.
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  this answer answered Sep 26 '14 at 16:36 Scott 2,322 1 11 28 1   it seems like it was an extension called site advisor but i never installed it, somehow it was installed. –  nosthertus Sep 26 '14 at 16:42      Yes, site advisor is known for doing that. You can safely disable it. Did I answer your question? –  Scott Sep 26 '14 at 18:03