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Major changes in Opera's extensions infrastructure
By Andreas Bovens · Tuesday, May 28, 2013 0
With Opera switching from Presto to Chromium and a complete UI remake, our extensions infrastructure has also gotten a major overhaul: from Opera 15 onward, Opera 11 & 12’s extension format is no longer supported, and instead, we’ve switched to Chromium’s extension model. Read more…
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Context Menu API
By Opera Software · Friday, August 24, 2012 39
The Context Menu API enables an extension to add an item to the context menu, otherwise known as the right-click menu. An extension may only add one item to the context menu, but this item may contain various layers of sub-items, similar to a folder/sub-folder structure. Read more…
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Screenshot API
By Opera Software · Wednesday, May 16, 2012 21
The Screenshot API for Opera extensions enables a screenshot to be taken of a page within a tab. Only the visible portion of the page is included in the screenshot, excluding the browser chrome (i.e. no toolbars and scrollbars, etc.). Read more…
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Creating Opera Speed Dial Extensions
By Daniel Davis · Tuesday, May 3, 2011 16
With the release of Opera 11.50 comes an exciting new enhancement to Opera Speed Dial: you can now write Opera extensions that will function inside Speed Dial windows, opening up a wealth of new possibilities! This article introduces you to the relevant concepts including the necessary config.xml updates, and the new SpeedDialContext API. Read more…
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Opera's lightweight themes
By Chris Mills · Thursday, October 13, 2011 65
Opera 12 brings with it a new lightweight theme system, which sits on top of the default Opera theme/skin and makes simple customisations much easier to achieve. In this article we'll take a look at how this lightweight system works. Read more…
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Cookie-sharing in Opera extensions
By Daniel Davis · Friday, June 24, 2011 6
Opera 11.50 for desktop introduces the ability for extensions to share cookies with the browser. As tempting as it is to dive into puns about milk and biscuits, we're going to look at how this new feature can help you make extensions that are easier for people to use. And this feature also just happens to be easy for developers to use as well. Read more…
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Converting widgets to Opera extensions: Things to keep in mind
By Shwetank Dixit · Wednesday, April 25, 2012 8
This article provides a solid set of advice to follow for those wishing to convert existing Widgets into Opera extensions. Read more…
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Resource Loader API
By Opera Software · Wednesday, May 16, 2012 21
Because of the security model that Opera extensions use, simply grabbing a local file from some parts of an extension has not been possible. For example, an injected script could not access an image file, even if it was within the same extension package. The Resource Loader API aims to solve this problem by making it easy to access any file within an extension package, from any part of the extension. Read more…