This tag is dedicated to development of extensions for the Opera browser.
This tag is dedicated to development of extensions for the Opera browser. Opera extensions are being developed using web technologies such as JavaScript, HTML and CSS. Starting points:
Chrome is very restrictive in side loading extensions (not through the Chrome Web Store). I need a way to install an extension for all users of my domain silently. Can Opera do that?
Thanks!
I am creating an Opera extension that will open a webpage which will allow user to stream a local window on to the browser html file. Since Opera extension structure is similar to the chrome, I tested the structure on Opera.
For manifest having…
Has anyone found out how to show images in Opera 25+ web notifications yet?
According to Opera, it should be possible, but I can't find any reference to how it's done. Already tried using it through the Chrome notifications API which is (partially)…
Upon updating from Opera 22 (22.0.1471.70) to Opera 23 (23.0.1522.77) I found out that the event chrome.runtime.onStartup does not work anymore. The update broke one of my extensions.
Wrote a little tester extension to try it out, pops an alert if…
My problem is simple. Is there a way to open an external file already saved in the computer via Opera extension? I know that normally in javascript on the web it's not possible dues to safety but isn't the extension local?
Thank you and have a nice…
I have an NPAPI plugin which works fine for Firefox, Chrome and Opera (Windows & Linux both). Now, since the support for NPAPI will be dropped sooner or later I created addons for Firefox and Chrome to get the same job done. In Firefox XPCOM and in…
It says in the Opera API (Formats: Manifest Files):
homepage_url
The URL of the homepage for this extension. The extensions management page will contain a link to this URL. If you distribute your extension using the Opera addons site, the homepage…
Trying to make my Chrome extension compatible with Opera.
For Chrome I can append the extension ID to "https://chrome.google.com/webstore/detail/" and I can get the Chrome Web Store url of that extension.
Does Opera have anything similar?
I'm having trouble playing mp3 files served from a remote domain in an Opera extension. I'm using jPlayer. Is it at all possible to play mp3 from another domain in Opera. Because as far as i know Opera only supports mp3 in flash, but flash probably…
Does Opera api support notifications and background in the manifest file?
When I load extension, I get:
There were warnings when trying to install this extension:
Permission 'notifications' is unknown or URL pattern is malformed.
Permission…
Is there some way to add a speed dial component to an existing extension? Or does the speed dial always have to be a separate extension?
I want to have an extension, but then have a speed dial that communicates with the extension.
Looking at the…
I'm making a Speed Dial extension for Opera 15+ (the Webkit-based ones) and I want to embed a custom font.
Now, I'm quite used to embed fonts using Google Fonts, but as far as documentation says this is not possible because of security concerns.…
I have an extension for Chrome that was working fine on Opera 15 (and works fine on Chrome 29).
Stating with Chrome 16, I get this error:
Uncaught TypeError: Cannot call method 'getBackgroundPage' of undefined
Spefically, chrome.extension is…
Is it possible to install multiple instances of some speed dial extension to provide different speed dials? for example http://addons.opera.com/ru/extensions/details/custom-speed-dial-image/?display=en
I'd like to upload CRX/NEX extension in opera gallery with certain ID. In Google Chrome gallery I can upload a zipped extension and add "chrome.pem" file in archive. Is there similar solution for opera gallery?
