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How do I turn off underlining of acronyms?

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For some reason acronyms like SEO and PR are being underlined with a dotted line when I visit webpages and forums. There are then displayed tool tips which try to guess the meaning. Both assumed a search engine related definition (search engine optimization and page ranking), which were not correct. This is happening on up to date installations and other computers which have been virus scanned.

For some reason acronyms like SEO and PR are being underlined with a dotted line when I visit webpages and forums. There are then displayed tool tips which try to guess the meaning. Both assumed a search engine related definition (search engine optimization and page ranking), which were not correct. This is happening on up to date installations and other computers which have been virus scanned.

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kah5217 wrote:

This is happening on up to date installations and other computers which have been virus scanned. 

It looks like you're using Firefox 13.0.1, which isn't by any means up-to-date. It's a very old version that contains numerous security vulnerabilities.

Since you haven't provided an example link where the problem occurs, I can't be sure, but you're probably seeing so-called “in-text advertising”.

It looks like you already have Adblock Plus installed, so you shouldn't be seeing any ads. Try subscribing to both Fanboy's List and Fanboy's Annoyances.

If subscribing to those lists doesn't help either, then the ads may be inserted into pages by one or more add-ons you have installed in Firefox.