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3.9 KiB
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91 lines
3.9 KiB
ReStructuredText
.. -*- Mode: rst; fill-column: 100; -*-
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==========================
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Shipping Default Domains
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==========================
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Firefox for Mobile (Android and iOS) ships sets of default content in order to improve the
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first-run experience. There are two primary places where default sets of domains are used: URLBar
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domain auto-completion, and Top Sites suggested thumbnails.
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The source of these domains is typically the Alexa top sites lists, global and by-country. Before
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shipping the sets of domains, the lists are sanitized.
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Domain Auto-completion
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======================
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As you type in the URLBar, Firefox will scan your history and auto-complete previously visited
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domains that match what you have entered. This can make navigating to web sites faster because it
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can avoid significant amounts of typing. During your first few uses, Firefox does not have any
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history and you are forced to type full URLs. Shipping a set of top domains provides a fallback.
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The top domains list can be localized, but Firefox will fallback to using en-US as the default for all
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locales that do not provide a specific set. The list can have several hundred domains, but due to
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size concerns, is usually capped to five hundred or less.
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Sanitizing Methods
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------------------
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After getting a source list, e.g. Alexa top global sites, we apply some simple guidelines to the
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list of domains:
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* Remove any sites in the Alexa adult site list.
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* Remove any locale-specific domain duplicates. We assume primary URLs (.com) will redirect to the
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correct locale (.co.jp) at run-time.
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* Remove any explicit adult content* domains.
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* Remove any sites that use explicit or adult advertising*.
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* Remove any URL shorteners and redirecters.
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* Remove any content/CDN domains. Some sites use separate domains to store images and other static content.
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* Remove any sites primarily used for advertising or management of advertising.
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* Remove any sites that fail to load in mobile browsers.
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* Remove any time/date specific sites that may have appeared on the list due to seasonal spikes.
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Suggested Sites
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===============
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Suggested sites are default thumbnails, displayed on the Top Sites home panel. A suggested site
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consists of a title, thumbnail image, background color and URL. Multiple images are usually
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required to handle the variety of device DPIs.
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Suggested sites can be localized, but Firefox will fallback to using en-US as the default for all
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locales that do not provide a specific set. The list is usually small, with perhaps fewer than ten
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sites.
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Sanitizing Methods
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------------------
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After getting a source list, e.g. Alexa top global sites, we apply some simple guidelines to the
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list of domains:
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* Remove pure search engines. We handle search engines differently and don't consider them to be
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suggested sites.
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* Remove any locale-specific domain duplicates. We assume primary URLs (.com) will redirect to the
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correct locale (.co.jp) at run-time.
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* Remove any explicit adult content domains.
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* Remove any sites that use explicit or adult advertising.
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* Remove any URL shorteners and redirecters.
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* Remove any content/CDN domains. Some sites use separate domains to store images and other static
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content.
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Guidelines for Adult Content
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============================
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Generally the Adult category includes sites whose dominant theme is either:
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* To appeal to the prurient interest in sex without any serious literary, artistic, political, or
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scientific value
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* The depiction or description of nudity, including sexual or excretory activities or organs in a
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lascivious way
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* The depiction or description of sexually explicit conduct in a lascivious way (e.g. for
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entertainment purposes)
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For a more complete definition and guidelines of adult content, use the full DMOZ guidelines at
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http://www.dmoz.org/docs/en/guidelines/adult/general.html.
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Updating Lists
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==============
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After approximately every two releases, Product (with Legal) will review current lists and
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sanitizing methods, and update the lists accordingly.
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