原文来自 15 Coolest Firefox Tricks Ever，大致内容如下：

1) More screen space. Make your icons small. Go to View - Toolbars - Customize and check the “Use small icons” box.

更多的网页显示空间。查看-工具栏-定制，勾选 使用小图标。

2) Smart keywords.

使用智能关键字（搜索操作）。可参考下面日志

firefox 添加 keyword 搜索

给opera 添加搜索百度 keyword

3) Keyboard shortcuts.

快捷键。

* Spacebar (page down) 相当于 pagedown

* Shift-Spacebar (page up) 相当于 pageup

* Ctrl+F (find) 搜索

* Alt-N (find next) 搜索下一个

* Ctrl+D (bookmark page) 收藏当前页面

* Ctrl+T (new tab) 开新标签页

* Ctrl+K (go to search box) 切换到搜索框

* Ctrl+L (go to address bar) 切换到地址栏（ie 是alt+d；opera 是 ctrl+L；firefox两个操作都可以）

* Ctrl+= (increase text size) 字体放大（大小键盘的+-号都可以）

* Ctrl+- (decrease text size) 字体缩小

注意：ctrl+鼠标滚轮也可以控制字体大小；另外，ctrl+0 恢复默认字号

* Ctrl-W (close tab) 关闭当前标签页

* F5 (reload) 刷新（ctrl+r 也可以）

* Alt-Home (go to home page) 回首页

opera 某些版本的回首页居然是 ctrl+space，而这默认是输入法的操作方式，你可以参考此文 opera ctrl+空格 切换输入法的问题

4) Auto-complete.

网址自动补全。ctrl+enter 补全 www. 和 .com；shift+enter 补全 .net；ctrl+shift+enter 补全 .org。

5) Tab navigation.

标签页导航

* Ctrl+Tab (rotate forward among tabs)

* Ctrl+Shft+Tab (rotate to the previous tab)

* Ctrl+1-9 (choose a number to jump to a specific tab)

6) Mouse shortcuts.

鼠标快捷键

* Middle click on link (opens in new tab)

* Shift-scroll down (previous page)

* Shift-scroll up (next page)

* Ctrl-scroll up (decrease text size)

* Ctrl-scroll down (increase text size)

* Middle click on a tab (closes tab)

7) Delete items from address bar history.

地址栏的历史记录是可以删除的。上下箭头选，delete键删除。（这个有意义嘛？谁有闲情逸致去维护一个漂亮整洁的历史记录呢？伪装给安全局看？：（）

User chrome.

定制 userChrome.css 文件。UserChrome.css 可以订制你需要的 firefox 外观

9) Create a user.js file.

定制 user.js 文件。

10) about:config.

在这里查询about:config 的资料

11) Add a keyword for a bookmark.

为书签加入关键字（和搜索的那个 keyword 类似）。右键书签，属性…

（我觉得下面这些技巧基本上属于扯淡，一个浏览器而已，能有多慢，想有多快？要是魔兽或者飞车弄个这样的技巧还有点意义，不翻自看）

12) Speed up Firefox.

加速技巧。

* Type “about:config” into the address bar and hit return. Type “network.http” in the filter field, and change the following settings (double-click on them to change them):

* Set “network.http.pipelining” to “true”

* Set “network.http.proxy.pipelining” to “true”

* Set “network.http.pipelining.maxrequests” to a number like 30. This will allow it to make 30 requests at once.

* Also, right-click anywhere and select New-> Integer. Name it “nglayout.initialpaint.delay” and set its value to “0″. This value is the amount of time the browser waits before it acts on information it receives.

13) Limit RAM usage. If Firefox takes up too much memory on your computer, you can limit the amount of RAM it is allowed to us. Again, go to about:config, filter “browser.cache” and select “browser.cache.disk.capacity”. It’s set to 50000, but you can lower it, depending on how much memory you have. Try 15000 if you have between 512MB and 1GB ram.

14) Reduce RAM usage further for when Firefox is minimized. This setting will move Firefox to your hard drive when you minimize it, taking up much less memory. And there is no noticeable difference in speed when you restore Firefox, so it’s definitely worth a go. Again, go to about:config, right-click anywhere and select New-> Boolean. Name it “config.trim_on_minimize” and set it to TRUE. You have to restart Firefox for these settings to take effect.

15) Move or remove the close tab button.

修改 tab 关闭按钮。

browser.tabs.closeButtons

设置 tab 关闭按钮的样式。lifehacher 推荐3，我个人推荐0。

0 当前tab显示关闭按钮

1 所有tab显示关闭按钮

2 所有tab都不显示关闭按钮

3 在tab bar 的最右面显示关闭按钮（firefox 1.5 的那种效果）

看这个 firefox 2.0 设置技巧 有更多说明。