A transparent 1x1 pixel image.
<hr><p><b>Mozilla's Explanation of Clear GIF's:</b>
What Are Clear GIFs? Clear gifs (also known as web beacons) are used in combination with cookies to help website operators understand how visitors interact with their websites. A clear gif is typically a transparent graphic image (usually 1 pixel x 1 pixel) that is placed on a site. The use of a clear gif allows the site to measure the actions of the visitor opening the page that contains the clear gif. It makes it easier to follow and record the activities of a recognized browser, such as the path of pages visited at a website.
</p><p>How We Use Cookies and Clear GIFs. Mozilla's websites use cookies to help Mozilla identify and track visitors, their usage of Mozilla websites, and their website access preferences across multiple requests and visits to Mozilla's websites. Our websites, and advertisements that Mozilla may run occasionally on thirdparty advertising networks, also may use clear gifs for these purposes. The basic idea is to gather aggregate data about how people use the Mozilla websites. The term usually used to describe this is "web analytics" and the cookies and clear gifs are the tools by which a website owner collects this web analytics data.
</p><p>Mozilla will use the web analytics data only to determine aggregate usage patterns for our websites as described above. Mozilla websites do this by using either our own internal analytics software or by sending this information to a third-party service provider to help Mozilla analyze this data. Mozilla has agreements with its third-party service providers that they will not share this information with others or use the information for purposes other than to maintain the services they provide to Mozilla. It is possible to link cookies and clear gifs to personally identifying information, thereby permitting website operators, including our third-party analytics providers, to track the online movements of particular individuals. Mozilla does not do so and its third-party service providers are not allowed to correlate Mozilla data with any other data.
</p><p>Mozilla uses the information provided by cookies and clear gifs to develop a better understanding of how Mozilla's visitors use Mozilla's websites, and to facilitate those visitors' interactions with Mozilla's websites. Mozilla may make the aggregate data obtained from web analytics (including from our third-party analytics providers, if applicable) publicly available. If this data is made available, none of the information will be personally identifying information or potentially-personally identifying information.
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<a href="https://en.wikipedia.org/wiki/User:Bob" class="extiw" title="w:User:Bob">Bob</a> (<a href="https://en.wikipedia.org/wiki/User_talk:Bob" class="extiw" title="w:User talk:Bob">talk</a>) (<a href="https://en.wikipedia.org/wiki/Special:ListFiles/Bob" class="extiw" title="w:Special:ListFiles/Bob">Uploads</a>)
<span class="int-own-work" lang="en">Own work</span>