7,439 questions
Score of 0
0 answers
47 views
Is Services.prefs still accessible from Firefox extensions? [duplicate]
I want to read an option from about:config and revert it (0 â 1, 1 â 0).
In manifest.json I wrote:
â¦
"manifest_version": 2,
"name": "MyName",
"version": "1....
Score of 0
0 answers
138 views
My firefox extension does NOT automatically start when I start my browser, don't know why
The title basically. I have a extension called NoClanker which blocks out AI websites automatically. It's been a while since I updated it since life got busy. The extension does not automatically ...
Score of 3
0 answers
93 views
Update of self-hosted Firefox add-on not working automatically but manually â why?
I have a Firefox add-on ported from a Chrome extension and, for reasons of Mozilla policy, I have had to host it on a server of my own. In order for users to have their add-ons updated, I have created ...
Score of 1
1 answer
138 views
firefox extension: how do i write/update the side bar from firefox extension?
I'm writing a firefox (v.147) extension and I'm able to open a side bar.
How do I update/dynamically write messages (or add elements) from the extension onto the side bar?
Score of 0
0 answers
207 views
Firefox WebExtension new-tab <video> briefly flashes black between poster and first frame, even though source video has no black frame
I am building a Firefox âNew Tabâ WebExtension that shows a full-screen looping video wallpaper (cat + fireplace). For perf reasons I try to show a static preview instantly and then fade into the live ...
Score of 0
1 answer
115 views
Is there a way to get more detailed error messages from browser.scripting.executeScript?
Iâm trying to run a simple script that extracts the length of a YouTube video inside of a tab from an extension in Firefox. I have code that looks like this:
try {
duration = await browser....
Score of 1
1 answer
291 views
React Router With Browser Extension Popup Window?
I'm trying to incorporate React Router into my Firefox browser extension to be able to display different pages in the extension's popup window. However, I keep getting the warning, You should call ...
Score of 0
1 answer
101 views
Can modern Firefox addons/extensions edit user preferences (i.e. about:config properties)?
I keep toggling the preference full-screen-api.ignore-widgets via the Configuration Editor (i.e. about:config) and I'm wondering if Firefox would allow an extension to perform that change ...
Score of 0
0 answers
110 views
browser.runtime.sendNativeMessage â An unexpected error occurred
To implement browser bookmark integration Iâm trying to use Firefox native messaging on macOS. Even a trivial shell script that just writes to /tmp/test.log is never executed. Firefox just fails ...
Score of 0
1 answer
717 views
How to not trigger Firefox's strict Content Security Policy by my extension
I am currently contributing on an extension, and the main problem is that on Firefox, the CSP is being triggered, which causes quite a few issues. Mainly it seems to block the injection of dynamic CSS,...
Score of 0
1 answer
385 views
Install modified XPI on Firefox or Fennec while disconnected from the internet [closed]
I want to download an XPI extension, and then add a console.log('hello, XPI world'); to one of its JS files. My browser is Fennec installed from F-Droid on Android.
I am looking for an equivalent to ...
Score of 0
1 answer
170 views
Getting around X-Frame-Options DENY in a Chrome extension? (2)
I have an iframe loading inside an extension page but unfortunately the document inside the iframe embeds its own iframes whose Content-Security-Policy I still can't circumvent with ...
Score of 1
1 answer
177 views
Plasmo Firefox production build: Uncaught (in promise) Error: Could not establish connection. Receiving end does not exist
With plasmo 0.90.5, I faced this issue when trying to run my Firefox extension that I built with manifest v3. This issue happens when I try to pass a message to the content script.
Uncaught (in ...
Score of 3
1 answer
328 views
Is it possible to modify the body of an outgoing HTTP request in a Firefox add-on?
I am making a Firefox add-on and I need it to have the ability to modify the bodies of certain outgoing HTTP requests. The instructions for modifying headers are readily available on Mozilla's own ...
Score of 0
1 answer
152 views
Unable to open Vue Devtools from Toggle or Select Components in Firefox/Chrome on macOS
Environment:
OS: macOS (e.g., Sonoma or Ventura)
Browsers tested: Firefox (latest), Chrome (latest)
Vue Devtools version: [7.7.7]
Vue version: [e.g., Vue 3.4.21]
Devtools installation method: Browser ...