@font-face正在Firefox中删除字母-@font-faceisdroppinglettersinFirefox

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You can tell Firefox to skip looking for ligatures and treat them as regular characters by adding -moz-font-feature-settings: "liga=0" in your font-face declaration.

您可以通过在font-face声明中添加-moz-font-feature-settings：“liga = 0”来告诉Firefox跳过查找连字并将它们视为常规字符。

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For anyone reading this in the future, note that as of FF 15 (I think) the syntax has now changed, and you'll need to use this:

对于将来阅读本文的人，请注意，从FF 15开始（我认为）语法现在已经改变了，你需要使用它：

-moz-font-feature-settings: "liga=0";
-moz-font-feature-settings: "liga" 0;

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In case others hit this problem, I resolved it with help from MyFonts technical support. I'm not sure whether this issues is specific to MyFonts, but I suspect it affects other web font sources.

如果其他人遇到这个问题，我在MyFonts技术支持的帮助下解决了这个问题。我不确定这个问题是否特定于MyFonts，但我怀疑它会影响其他Web字体来源。

Direct (Solvable) Cause

直接（可解决）原因

When a standard True Type font (TTF) gets processed into the multiple versions that are useful for a web font (EOT, SVG, WOFF), the processing tool or vendor can decide whether or not to include the font's full character set. Some will default to a reduced character set to reduce file sizes.

当标准True Type字体（TTF）被处理为对Web字体（EOT，SVG，WOFF）有用的多个版本时，处理工具或供应商可以决定是否包括字体的完整字符集。有些将默认为缩小字符集以减小文件大小。

In my case, one or more of the generated web font files excluded ligatures, presumably considering them to be non-essential typographic tweaks. To fix the problem I used a custom web font builder at MyFonts to generate font files with the full character set.

在我的例子中，一个或多个生成的Web字体文件排除了连字，大概认为它们是非必要的排版调整。为了解决这个问题，我在MyFonts使用了一个自定义Web字体构建器来生成具有完整字符集的字体文件。

(For MyFonts specifically this was at Order History > select relevant font > Webfont Kit Builder tab > Advanced, then check both "Complete Character Set" and "Keep OpenType Layout".)

（对于MyFonts，特别是订单历史>选择相关字体> Webfont Kit Builder选项卡>高级，然后检查“完整字符集”和“保留OpenType布局”。）

Underlying Cause

根本原因

My belief, which is only an educated guess:

我的信念，这只是一个有根据的猜测：

I think Firefox is going out of its way to do nice typography, more so than other browsers. So when it sees something that it could render as a ligature ("fi", "fl", "ff", etc.) it tries to render the letters as a single ligature glyph rather than as two distinct characters. If your web font doesn't include the ligature glyphs, your letters will disappear. (If my guess is right, I'm surprised I haven't read about this problem before.)

我认为Firefox比其他浏览器更能做出漂亮的排版。因此，当它看到可以呈现为连字（“fi”，“fl”，“ff”等）的东西时，它会尝试将字母渲染为单个连字字形而不是两个不同的字符。如果您的网络字体不包含连字字形，则您的字母将消失。 （如果我的猜测是对的，我很惊讶我之前没有读过这个问题。）

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Myfonts.com recently changed some display settings. Their support wrote back very quickly with the following info:

Myfonts.com最近更改了一些显示设置。他们的支持很快回复了以下信息：

If you click on the Font image (the image that shows the sample), which is located right above Kit Options, you will see the Complete Character set and Keep OpenType Layout options.

如果单击位于“工具箱选项”上方的“字体”图像（显示示例的图像），您将看到“完整字符集”和“保留OpenType布局”选项。

This view is not currently available through Firefox though, but I was able to download the complete character sets using IE9.

这个视图目前不能通过Firefox获得，但我能够使用IE9下载完整的字符集。