Questions tagged [content-script]

JavaScript files known as content scripts play a crucial role in enhancing browser extensions or add-ons. These scripts enable extensions to seamlessly interact with the document context of the ongoing web page, particularly in popular browsers like Firefox and Chrome.

The issue of variable stagnation in Firefox content script while utilizing self.port.on

I'm having trouble updating the version var as intended. When I try to update it with the following code: self.port.on("get-version", ver => { version = ver; alert(version); }); An alert pops up displaying the correct version number, but the HTML stil ...

javascriptfirefoxfirefox-addonfirefox-addon-sdkcontent-script

passing commands from a chrome extension to a content script

I want to set up a hotkey that will activate a function in my content script. The content script (main.js) is run when the page loads from my popup.js file. I've included the command in my manifest.json and I can see in the console log that it is tri ...

javascripthtmlgoogle-chrome-extensionsendmessagecontent-script

Content Security Policy Error triggered by Iframe Source Running Script in Web Extension

My web extension for Firefox utilizes a content script to add HTML to a webpage when a button is clicked. The injected HTML includes an iFrame nested in multiple div elements. Below is the relevant part of the content script: var iFrame = document.create ...

javascriptfirefox-addon-webextensionscontent-security-policycontent-script

Add the content script to a webpage just one time

I am looking to inject a content script on context menu click in an extension manifest version 3. I need a way to determine if the script is already injected or not. If it hasn't been injected yet, I want to inject the content script. This condition must b ...

javascriptgoogle-chrome-extensioncontent-script