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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:

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How to know whether a chrome extension is downloaded from store?

I develop a chrome extension which is also compatible with Firefox/Edge/Opera. The extension rely on a REST API accessible over the web. During the web development, I prefer pointing to a development endpoint where it does not affect the production…
Jonathan DEKHTIAR
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Chrome extension: Open file dialog from background script

I am working on a music player extension for Opera browser. The idea is simple: select files from the local machine and play them in the sidebar. Thanks to the
Nekomajin42
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Open external program using URI Scheme without creating new tabs

I want to pass url to external program (open url with program), but without creating new tab/window. I used "chrome.contextMenus.create" to open url with program: right-click the link & "open with external program":…
user25
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How to open a web page on the sidebar?

In the old version of the Opera was the ability to insert on the side panel of the website. Thus it was possible to use two sites in split screen mode. How to do the same in Opera 30? To create an extension with is not suitable, as some sites…
Alex Kozack
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Can an Options page have a page action in an Opera extension?

I have a Google Chrome extension that I’m wanting to convert to an Opera extension. Part of the functionality is that the options page has a page action. manifest.json: { "name": "Option Page Action", "version": "0", …
Teepeemm
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Omnibox results are sorted alphabetically in Opera

I'm currently trying to port my Chrome extension Prime Player to Opera. It uses the chrome.omnibox API which should work exactly the same way as in Chrome according to the spec. However, it seems that the results are sorted alphabetically (by…
Sven Ackermann
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Opera Next extension autoupdate via update_url

I got problem with my company internal extension. They don't want to publish it, as it does gather data on external server. So I need to host it myself... but would like not to lose ability of autoupdate. As far as I read I need to use update_url in…
Flash Thunder
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Further information about chrome.webRequest.onErrorOccurred

I am attempting to develop a browser extension which will increase the resilience of chromium-based browsers when confronted with error conditions. Is it possible to obtain a list of all possible errors that chromium-based browsers could encounter,…
DMCoding
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Opera 15+ Extension tabs.sendMessage works only after browser restart

I reworked the "Clip to DEVONthink" to use in Opera 15+. The problem I'm left with is that the extension only works after a browser restart. Update 1: Tested on Mac OS X 10.9.2 with Opera 21.0.1432.67, Opera Next 22.0.1471.40 and Google Chrome…
boretom
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How to get the raw text from Opera's omnibox when the text is not a valid URI

Since Opera no longer implements the shortcut "/." to visit slashdot.org, I thought to write an extension that replaces that functionality. I have not previously written an Opera extension, so I hit the docs. Setting up an omnibox extension doesn't…
DigitalStefan
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Pack opera NEX extension via command line

Can you please assist on way to pack extension using command line and the developer key that we own? I am afraid I haven't found anything in document.
se_pavel
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Opera 15+ extension - inline installation from addons.opera.com

I have extension published in addons.opera.com catalog. Is there a possibility in addons.opera.com "inline" installation from my site, as it done in the ChromeWebStore https://developers.google.com/chrome/web-store/docs/ When extension hosted in the…
user1183521
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Can Opera Speed Dial extensions communicate with regular extensions?

Is there a way for a speed dial extension to use some sort of communication mechanism to talk to an extension? We have an extension that does mail checking, but it uses a pretty complex login process involving tokens and cookies. We don't have an…
Mike Kaply
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Extension Update behavior when Upgrading from Opera 12 to Opera 15

my question is about the update behavior when updating Opera 12 to Opera 15 from the extensions. When you have a Opera 12 Extension installed from the Add-on Website, after updating to Opera 15, will then the corresponding Opera 15 extension be…
medmanu
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Simple Opera plugin

How to write a simple Opera plugin? I'd like to develop a plugin that would change the Referer header of a request based on request's url data. Opera's website says plugins should be developed using Netscape4 Plug-in API. However there's not so much…
Alex
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