While developing, I often need to clear cache data - but just wish to do so for one site. I don't see any such option under History -> Clear browsing data

How can I zoom an HTML element in Firefox and Opera? The zoom property is working in IE, Google Chrome and Safari, but it’s not working in Firefox and Opera. Is there any method for adding this p...

i am using flutter for web development, and i want to run it on different browsers... opera, chrome, firefox and etc... so i am trying to find a way to add this to my devices list i have opera down...

I tried the <input type="number" /> but on Opera that outputs a strange input box coupled with an "up and down" handler. What I expected was a regular text field that once you focus on it pro...

I hope this suits on Stackoverflow. When I work from localhost and "reach out" to the Stripe JavaScript library I get this error: Failed to load resource: net::ERR_BLOCKED_BY_ADBLOCKER I have f...

First off, I'm not sure whether this is a problem in Opera 12.01 or not, but the problem only occurs in Opera. I've tested in FF14, Chrome 21, Safari 5 (Windows) and Safari Mac and Webkit browsers ...

I have a web application that listens for Server Sent Events. While I was working and testing with multiple windows open, things were not working and I banged my head for several times looking in t...

Red-colored message appeared, presumably after browser auto-update: Warning! This area is for use by developers only. Scammers have been known to encourage people to copy/paste information here t...

Can someone help me please, I have a problem in CORS policy and I have no access to the backend of the site. This is the code I use in the backend (node.js): app.use(cors({ Access_Control_Allow_O...

In JS security issue with Opera 11.01, after moving from server A to B I learned that opera has some "cross-network" protection. I encountered the same js security problem and I found that Opera 1...

I'm want to use the window.scrollTo function with smooth behaviour. For example: window.scrollTo({ top: 0, behavior: 'smooth' }) Parallel I want to change an elements color. For this I could use t...

I'm building a Spring Boot application with Spring Security. I have a delete functionality which is done through AJAX request using JavaScript's Fetch API. The functionality works correctly in Chro...

I've got a problem. Using ajax I sent a correctly formed JSON object using: $.ajax({ type: "POST", url: SITE_URL+'/data.php', dataType: "json", data: { ajax: 1 }, success: function(data) {...

I wish to implement the suggestion in this post: Visual Studio 2012 Mobile Device Emulators but Opera Mobile Emulator seems to no longer come in a Windows version. Anyone else experiencing this i...

In Opera (and only Opera), a HTML5 video comes with a button at the top which allows you to pop the video out of the webpage. Is there a way to disable this in javascript, jquery or CSS? Here is...

I'm developing the project witch contains 6 audio and video elements which plays one after another. The code order before issue is like that: preloading all media resources till "canplaythrough" ...

I've been working on a dropdown menu similar to Suckerfish. I've got the dropdown side working now, but I have some images I'm trying to put on either side of the links. Right now I'm using a div t...

I got stuck with a strange problem in Opera 12: I have an .svg image which is linked within my css code. When I resize to zoom-out the page where the image is displayed, Opera repeats the image as ...

I have run into an issue on webkit browsers (IE and FF are ok) where the scrollbar space is reserved for an element even though the scrollbar is not showing. You can see in the example that once th...

The opera browser has a built-in VPN which allows you to hide your IP while browsing. My question is can the VPN be turned on while using OperaDriver with selenium in python? Attempt and problem ...

i'm trying to use Font Awesome but instead of any icons it just displays any asian signs. I downloaded font awsome to by webserver for that. I tried this in 3 different browsers (firefox, opera and...

I wanted to see how many simultaneous SSE (aka EventSource) connections I could setup, before overloading my machine. But testing with Firefox (Firefox 18 or Firefox 20) it stopped at 6 connections...

I'm coding on a website with forms and use HTML5 validation - no rocket science so far. Everything works fine for me in Google Chrome, but I want to get sure that even a IE 6 user with no formvalid...

Is there a React Development plugin for Opera ? The Opera (DragonFly) and Chrome Development Tools seem nearly identical. There seems to be no plugin for Opera that supports React Development. Is t...

According to caniuse, Opera supports the Speech Recognition API. However, when attempting to view a simple example, I cannot find the "allow" button alluded to upon click of the microphone icon. In...