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As suggested by Ciavash: https://groups.google.com/d/msg/mozilla-labs-jetpack/U2jHWqgXu48/ZnXkZJ7-9CEJ As I see it, this is so that developers could programatically react to the content type of a tab.
It can be useful when you want to do something based on type of the content. If you want to add something to the image viewer for example, you need to know that the content is an image, then do something with it. In my add-on, I had to look for "resource://gre/res/TopLevelImageDocument.css" in the link tag to find out that an image is being displayed. My add-on: https://addons.mozilla.org/en-US/firefox/addon/imgviewerplus/
Created attachment 643967 [details] Pointer to Github pull request: https://github.com/mozilla/addon-sdk/pull/502 Pointer to Github pull-request
This will work correctly on mobile, yes?
`tabs` module doesn't work on mobile at all, so I'm not sure I got the question. Mobile should supports the `document.contentType`, so as soon as the `tabs` module will works on Mobile, that properties will be work as well (along `url` and `title` properties). if I misunderstood the question, could you be more explicit?
Commits pushed to master at https://github.com/mozilla/addon-sdk https://github.com/mozilla/addon-sdk/commit/22ef0f33ffb300692391c632d59f68bc71693602 Bug 775606 - ENH add a 'tab.contentType' property to the tab object Added `tab.contentType` to tabs API, updated test and docs https://github.com/mozilla/addon-sdk/commit/1002551cb9932869292d645c6a90e93204cd7090 Merge remote-tracking branch 'upstream/master' into tab.contentType/Bug775606 Conflicts: packages/api-utils/lib/tabs/tab.js https://github.com/mozilla/addon-sdk/commit/74f25256b5aa57a187d87d990f5fec5d1d45d0fd Merge pull request #502 from ZER0/tab.contentType/Bug775606 fix Bug 775606 - ENH add a 'tab.contentType' property to the tab object r=@gozala