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Questions tagged [opera-extension]

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:

116 questions
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Using Stored Data to Define Sub Menu Entries

My extension should use the user's options to build submenus under the main extension context menu entry. The options are stored in a table, where each line is defining a submenu. The whole table is stored as a json string in chrome.local.storage…
fraz
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Using element.click() to simulate a Button Click in Javascript

I'm trying to write an extension for Opera that automatically sends specific chat messages. (Commands, to be exact.) For that, I want to enter the message into the textarea, simulate a button click to send the message and read the reply I get. I've…
Kileraptor1
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opera/chrome context menu in the url bar/omnibar

With Opera, I'm playing with the example extension that looks up a selected text using the contextMenu. I would like to add a menu entry in the contextMenu when the user right click in the address-bar (url-bar, omnibox and so on) I have tried In…
fraz
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Sidebar API opr.sidebarAction.setBadgeText doesn't work in Opera 36.0.2114.0

In extensions on Opera 36.0.X isn't possible show badge over icon on sidebar. Bug is confirmed on 36.0.2114.0 and didn't exist on 34.0.X
StayAtHome
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How can a Chrome extension check at runtime if it is running on Opera?

Since Opera supports the Chrome extension API, it is almost possible to run a full-featured Chrome extension on this browser. However there are still some missing features in the API. Is there a simple and efficient way to check if an extension is…
guillaumekln
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Bookmarks thumbnails in Opera

is there any permission (like chrome://favicon/) that will allow me to access bookmark images? so far, I'm only getting Not allowed to load local resource: when trying to get bkm image
Wolf War
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session API in Opera empty on start

Session API in Chrome gives tabs from previous session (until new one is written) but Opera doesn't. Is there any way to get previous session tabs on Opera start? (with JS ofc)
Wolf War
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Context menu in Chrome - two actions (left/right click on item menu)

I want to create an extension for chrome browsers: item menu in context menu with two different actions when you use left or right click on item menu. For Firefox it can be realized, but for Chrome?…
user25
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How to get the Speed Dial and Trash bookmark folders

Is there any reliable way to get the Speed Dial and Trash bookmark folders? Are the ids of the system bookmark folders the same for all installations? I could do a loop though with an id match but I'm not sure if the ids are the same for all Opera…
bland.life
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Opera extension "A package with this name already exists"

I uploaded new add-on, but failed counting. So I've tried to upload again after delete it, but error message keeps coming up. The error message is "A package with this name already exists. Please change the name or upgrade the existing package."…
Kim Seong Eun
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Plugin for Opera. DOM-tree modification

I want to create a plugin for opera that modifies tha DOM-tree after the page have been loaded. Does opera have an appropriate plugin API?
Vitali Kotik
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Loading an extension's popup.html from another extension

Opera recently announce their sidebar extensions. In their boilerplate they load a URL into an iframe, similar to this: http://julip.co/2010/01/how-to-build-a-chrome-extension-part-3-loading-any-web-page-in-a-popup/ I aim to make a universal wrapper…
bland.life
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Are there plans to support chrome.system.display API in a future version of Opera?

I was planning to port over my chrome extension Tab Resize to Opera. I'm using the chrome.system.display API to get the user's display information in order to support multi-screen setups. I wanted to check if there were plans to support the display…
peterdotjs
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prevent mouse gesture in Opera

Is there any way with JS to cancel mouse gesture? not permanently, but only when needed, eg. in certain frame, event.. I tried onmousemove return false; e.stopPropagation(); e.preventDefault(); nothing helped, gesture is fired every time
user3307259
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Is it possible to create a global Chromium extension which will update itself automatically?

We create extensions for Chrome, Firefox, Safari and Internet Explorer. We don't have an extension for Opera (yet), but I noticed that if I install the .crx file in Opera, everything works the same as in Chrome. I would like to know if we can create…
Uri
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