¤什么是about:config¤
about:
config是Firefox的设置页面，Firefox提供了不少高级设置选项在这里以便让你可以更加详细地控制Firefox的运行方式。官方不推荐
用户手工修改about:config的设置。所以，如果你对于你想修改的内容不是非常确定的话，请不要去改变它。）
打开Firefox中
about:config设置的方法是在Firefox地址栏输入about:config，然后回车。这份列表包括了尽可能多的 Mozilla
参数。虽然它并不完整，但它可以说是目前互联网上最全面的一份参数说明了。此列表适用于 Mozilla Suite, Mozilla
Firebird, Mozilla
Thunderbird或其派生的产品及相关扩展。如果没有找到您需要的参数，您还可以到MozillaZine站的英文版About:config
entries ([url]http://kb.mozillazine.org/About:config_Entries[/url])中寻找。
注意：所有使用到 FOO 或者 BAR 的地方都是通配符。使用数字或文本替换它(具体用什么取决于上下文环境)，Mozilla 将只列出匹配此模式的选项。
about:config 中的条目非常多，我们把它按照字母顺序分割为若干小块。比如，凡是以字母 a 开头的项均列入到A页中，以此类推。
目前，about:config 说明还不完善，期待你的翻译和改进。
¤正文介绍¤
1、accessibilityNavigation aids and useability * 浏览辅助工具
5、accessibility.tabfocus * 设定可以通过按TAB键来依次获得哪些页面元素的焦点
1 : Text field form controls only * 仅表单中的文本输入框
2 : All form controls except text fields * 除了文本输入框外的其它表单输入控件
3 : All form controls * 表单中的所有输入控件
4 : Hyperlinks and hyperlinked images * 超级链接和超级链接图片
7 : All form controls and hyperlinks * 表单中所有的输入控件和超级链接
6、accessibility.typeaheadfind * 打开\"type-ahead find\"（现在叫\"Find as you type\"）功能，
如名字所说，敲入几个字母，将快速定位到第一个包含这些字母的链接上。
或许可以翻译成\"即敲即找\"。
12、 accessibility.typeaheadfind.startlinksonly * 限制type-ahead
find只从链接开头搜索而不是从任何地方开始，*（比如输入kmc将定位到链接文字为\"kmc is a
boy\"的链接，但是不会定位到\"All boys are not kmc！\"上面）
210、capability.policy.default.DOMException * allAccess : All Access * noAccess : No Access
211、capability.policy.default.DOMParser * allAccess : All Access * noAccess : No Access
212、capability.policy.default.HTMLDocument * allAccess : All Access * noAccess : No Access
213、capability.policy.default.History * 允许访问历史属性和methods（method怎么翻译啊） * allAccess : All Access * noAccess : No Access
214、capability.policy.default.Location * 允许访问地址栏属性和methods（下面几个类似了） * allAccess : All Access * noAccess : No Access
215、capability.policy.default.Navigator * allAccess : All Access * noAccess : No Access
216、capability.policy.default.SOAPCall * allAccess : All Access * noAccess : No Access
217、capability.policy.default.Window * allAccess : All Access * noAccess : No Access
218、capability.policy.default.XMLHttpRequest * allAccess : All Access * noAccess : No Access
219、capability.policy.mailnews. * allAccess : All Access * noAccess : No Access
220、capability.policy.mailnews.DOMException * allAccess : All Access * noAccess : No Access
221、capability.policy.mailnews.DOMParser,parseFromStream * allAccess : All Access * noAccess : No Access
222、capability.policy.mailnews.DOMParser,parseFromString * allAccess : All Access * noAccess : No Access
223、capability.policy.mailnews.HTMLAnchor * allAccess : All Access * noAccess : No Access
224、capability.policy.mailnews.HTMLDocument * allAccess : All Access * noAccess : No Access
225、capability.policy.mailnews.Location * allAccess : All Access * noAccess : No Access
226、capability.policy.mailnews.Range * allAccess : All Access * noAccess : No Access
227、capability.policy.mailnews.SOAPCall * allAccess : All Access * noAccess : No Access
228、capability.policy.mailnews.SOAPEncoding * allAccess : All Access * noAccess : No Access
229、capability.policy.mailnews.SOAPFault * allAccess : All Access * noAccess : No Access
230、capability.policy.mailnews.SOAPHeaderBlock * allAccess : All Access * noAccess : No Access
231、capability.policy.mailnews.SOAPParameter * allAccess : All Access * noAccess : No Access
232、capability.policy.mailnews.SOAPPropertyBagMutator * allAccess : All Access * noAccess : No Access
233、capability.policy.mailnews.SOAPResponse * allAccess : All Access * noAccess : No Access
234、capability.policy.mailnews.SchemaLoader * allAccess : All Access * noAccess : No Access
235、capability.policy.mailnews.Window * allAccess : All Access * noAccess : No Access
236、capability.policy.mailnews.XMLHttpRequest * allAccess : All Access * noAccess : No Access
237、capability.policy.mailnews.XMLSerializer * allAccess : All Access * noAccess : No Access
238、capability.policy.mailnews.document * allAccess : All Access * noAccess : No Access
239、capability.policy.mailnews.sites * allAccess : All Access * noAccess : No Access
240、 capability.policy.policynames *Comma-separated list of defined
policies. For example, if the value of this field is 'popupsites',
Mozilla will look for and apply policies under
'capability.policy.popupsites.*' as for the 'default' scheme.
241、capability.policy.popupsites *Suggested policy name to apply to Mozilla sites that display unwelcome popups.
242、capability.policy.popupsites.windowinternal *Policy to apply to Mozilla sites that display unwelcome popups
243、 capability.policy.popupsites.windowinternal.open *Allow access
to opening windows * allAccess : All Access * noAccess : No Access
245、compose.throbber.url *Specifies URI to load when composer throbber is clicked
246、content.interrupt.parsing * [有待测试]
247、content.max.tokenizing.time * [有待测试]
248、content.maxtextrun * [有待测试]
249、content.notify.backoffcount * [有待测试]
250、content.notify.interval * [有待测试]
251、content.notify.ontimer * [有待测试]
252、content.switch.threshold * [有待测试]
253、converter.html2txt.header_strategy *Set how headers are used when converting HTML to Text
* 0 : No Identation
* 1 : Indentation, increased with header level
* 2 : Numbering and slight indentation
254、converter.html2txt.structs *Output structured phrases (based on strong, em, code, sub, sup, b, i, u tags)
255、custtoolbar.personal_toolbar_folder *Override name of the Personal Toolbar Folder
270、editor.auto_save_delay *If auto_save enabled, how many minutes between saves
271、editor.background_color *Default custom hex value (#RRGGBB) for background color
272、editor.background_image *Default location for background image
273、editor.css.default_length_unit *Determines default units for measurement in CSS
* cm : Centimetres
* em : Em space
* ex : Ex space
* in : Inches
* mm : Millimetres
* % : Percentage of parent element
* pc : Picas
* px : Pixels
* pt : Point
274、editor.default_background_image *Set default background image to use when creating new web pages
275、editor.encode_entity * [有待测试]
276、editor.followed_link_color *Default custom hex color (#RRGGBB) for visited links
439、general.open_location.last_window_choice *Last \"Open in...\" setting
* 0 : Current Nav Window
* 1 : New Nav Window
* 2 : New Nav Tab
* 3 : New Editor Window
440、general.startup * Mozilla启动选项 Mozilla startup preferences (set appropriate child to 'true' if that application should start)
441、general.useragent *用户代理(浏览器标识)选项
442、general.useragent.contentlocale *Specifies which locale URI should retrieve content locale information
443、general.useragent.locale *Specifies which locale URI should retrieve locale information
444、general.useragent.misc *Mozilla version
445、general.useragent.security *Mozilla security version
446、general.useragent.override *User-specified user agent用户自定义 user agent
447、image.animation_mode * 按如下方式显示Gif动画（将会覆盖动画图片的默认设置）
* normal : As many times as the image specifies * 正常（按图片的默认设置次数）
* once : Once * 循环一次
* none : Never * 无动画（Gif将变成静态图片）
514、mail.addr_book.show_phonetic_fields * Display fields for phonetic equivalents of Firstname and Lastname in Address Book
515、mail.attach_vcard * 为所有的新消息自动附上一个vCard。
516、mail.auth_login * [有待测试]
517、mail.auto_quote * 在回复时自动引用原消息。
518、mail.server * POP/NNTP邮件服务器设置。
519、mail.server.FOO.auth_login *
520、mail.toolbars.showbutton * 设置哪些邮件工具栏按钮可见。
530、mail.toolbars.showbutton.FOO * Show button \"FOO\" in mail window
531、 mailnews.reply_header_authorwrote * Text string used when an
author string is required in reply header (%s will be replaced by your
name)
532、mailnews.reply_header_colon * Text string used when colon is required in reply header
533、mailnews.reply_header_locale * Text string used when locale is required in reply header
534、 mailnews.reply_header_ondate * Text string used when a date
string is required in reply header (%s will be replaced by the date)
535、mailnews.reply_header_originalmessage * Text string used to denote original message in reply header
536、mailnews.reply_header_separator * Text string used to separate parts of the reply header
537、 mailnews.reply_header_type * Format of reply header. Use other
reply_header preferences to customize this further, in particular
'author_wrote' and 'ondate'.
* 0 : No Header * 1 : (author)(colon) * 2 : (date)(separator)(author)(colon) * 3 : (author)(date)(colon) * 4 : User Specified
538、mailnews.reply_on_top * How to reply to messages
* 0 : Start reply above the quoted text
* 1 : Start reply below the quoted text
* 2 : Select the quoted text and start above
* 3 : Select the quoted text and start below
539、mailnews.reuse_message_window * Do message replies have their own window or reuse the existing window
545、mousewheel.withaltkey.action * Alt ＋滚轮，Action to take
* 0 : Scroll document by X lines * 0 : 文档卷动X行
* 1 : Scroll document by one page * 1 : 文档卷动一页
* 2 : Move back/forward in history * 2 : 历史中前进或后退
* 3 : Make text larger/smaller * 3 : 增大或缩小字体
549、mousewheel.withcontrolkey.action *Ctrl＋滚轮 Action to take
* 0 : Scroll document by X lines * 0 : 文档卷动X行
* 1 : Scroll document by one page * 1 : 文档卷动一页
* 2 : Move back/forward in history * 2 : 历史中前进或后退
* 3 : Make text larger/smaller * 3 : 增大或缩小字体
550、mousewheel.withcontrolkey.numlines * Number of lines to scroll by (if relevant)
551、mousewheel.withcontrolkey.sysnumlines * Scroll by a number of lines equal to system default
552、mousewheel.withnokey.action * 当没有键按下时鼠标滚轮如何工作
* 0 : Scroll document by X lines * 0 : 文档卷动X行
* 1 : Scroll document by one page * 1 : 文档卷动一页
* 2 : Move back/forward in history * 2 : 历史中前进或后退
* 3 : Make text larger/smaller * 3 : 增大或缩小字体
553、mousewheel.withnokey.numlines *Number of lines to scroll by (if relevant)
554、mousewheel.withnokey.sysnumlines *Scroll by a number of lines equal to system default
555、mousewheel.withshiftkey.action * 当SHIFT键按下时鼠标滚轮如何工作
* 0 : Scroll document by X lines * 0 : 文档卷动X行
* 1 : Scroll document by one page * 1 : 文档卷动一页
* 2 : Move back/forward in history * 2 : 历史中前进或后退
* 3 : Make text larger/smaller * 3 : 增大或缩小字体
556、mousewheel.withshiftkey.numlines * Number of lines to scroll by (if relevant)
557、mousewheel.withshiftkey.sysnumlines * Scroll by a number of lines equal to system default
563、network.cookie.cookieBehavior * 设置允许存放那种cookie在本地计算机中
* 0 : Enable all cookies * 0 : 启用所有cookie
* 1 : Allow cookies from originating server only * 1 : 只允许原始站点的所有cookie
* 2 : Disable all cookies * 2 : 禁用所有cookie
566、 network.cookie.lifetime.behavior *
（只有在network.cookie.lifetime.enabled值为true时才能应用）决定cookie过期的时间。如果为1，则日期由
network.cookie.lifetime.days决定。
* 0 : Cookies expire at end of current session * 0：cookie在当前会话结束后过期
* 1 : Cookies expire after X days * 1：cookie在X天后过期
672、plugin.enable_double_buffer * Enable double buffering on pages when there are plugins in layout [Default: false]
673、print.print_edge_bottom * Bottom margin width (in mm)打印底端边界
674、print.print_edge_left * Left margin width (in mm)左
675、print.print_edge_top * Top margin width (in mm)顶
676、print.print_edge_right * Right margin width (in mm)右
677、print.print_evenpages * Print even pages only The default value is false.
678、print.print_extra_margin * Extra margin width (in mm)
679、 print.print_footercenter * Centered footer text. This may use
up to ONE of the special string constants &T, &U, &D,
&P or &PT (see drop-down box).
* &T : Title * &U : Document URL * &D : Date/Time * &P : Page Number * &PT : Page Number \"of\" Page Total
680、 print.print_footerleft * Left-aligned footer text. This may
use up to ONE of the special string constants &T, &U, &D,
&P or &PT (see drop-down box).
* &T : Title * &U : Document URL * &D : Date/Time * &P : Page Number * &PT : Page Number \"of\" Page Total
681、 print.print_footerright * Right-aligned footer text. This may
use up to ONE of the special string constants &T, &U, &D,
&P or &PT (see drop-down box).
* &T : Title * &U : Document URL * &D : Date/Time * &P : Page Number * &PT : Page Number \"of\" Page Total
682、 print.print_headercenter * Centered header text. This may use
up to ONE of the special string constants &T, &U, &D,
&P or &PT (see drop-down box).
* &T : Title * &U : Document URL * &D : Date/Time * &P : Page Number * &PT : Page Number \"of\" Page Total
683、 print.printheaderleft * Left-aligned header text. This may use
up to ONE of the special string constants &T, &U, &D,
&P or &PT (see drop-down box).
* &T : Title * &U : Document URL * &D : Date/Time * &P : Page Number * &PT : Page Number \"of\" Page Total
684、 print.printheaderight * Right-aligned header text. This may
use up to ONE of the special string constants &T, &U, &D,
&P or &PT (see drop-down box).
* &T : Title * &U : Document URL * &D : Date/Time * &P : Page Number * &PT : Page Number \"of\" Page Total
685、 print.print_margin_bottom * Specify bottom margin in half-inch
units (e.g. 2 units = 1\"). If the value is not specified, the system
default is used. This option has no default value.
686、 print.print_margin_left * Specify left margin in half-inch
units (e.g. 2 units = 1\"). If the value is not specified, the system
default is used. This option has no default value.
687、 print.print_margin_right * Specify right margin in half-inch
units (e.g. 2 units = 1\"). If the value is not specified, the system
default is used. This option has no default value.
688、 print.print_margin_top * Specify top margin in half-inch units
(e.g. 2 units = 1\"). If the value is not specified, the system default
is used. This option has no default value.
689、print.print_oddpages * Print odd pages only The default value is false.
690、print.save_print_settings * Save print settings
691、print.show_print_progress * Show print progress dialog box
692、print.use_global_printsettings * Each window maintains individual print settings
693、print.use_native_print_dialog * Use operating system-native Print dialog box
694、print.whileInPrintPreview * Allow printing directly from Print Preview screen
详尽介绍FireFox about:config
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