L10n:Localization Process: Difference between revisions

The negative side of using language packs is that your users won't get a localized install experience of Firefox, including the profile migration dialogs. The in-product webpages will come up in one of the official languages of mozilla.com, bookmarks and search engines will be taken from the build that your users installed originally. If your users decide to upgrade to the next major version, your language packs will stop working, and get disabled like other incompatible Add-ons, until you uploaded a compatible version on AMO again. We are working on improving this process specifically for Language Packs to achieve our objective of a good user experience overall. If you're working on a dialect or a minority language, the disadvantages of language packs are not that bad because the user most likely speaks one of the main languages used by AMO, but for languages spoken by people without a second language supported by the Mozilla community (thus far), getting Firefox out there requires more work.