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Firefox and Thunderbird: Beyond Browsing and Email by Peter D. Hipson

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Chapter 8. Making Extensions Work for You

Extensions are a way to allow the user to easily extend Firefox’s capabilities. Just like plug-ins add to the types of content Firefox can use, an extension enables you to add features and extend the interface of Firefox.

We know that not everyone wants the same things. Any program that tries to make everyone happy will be so large and awkward that it will be unusable. Instead, Mozilla has followed the path that the main product should have the common functionality most users will want. Then, when users want special things, these can be added ...

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