"manifest_version": 2,
 "name": "Calcolo Stipendio Netto",
 "version": "1.0",
 "description": "Calculate your Italian net salary (IRPEF, INPS, regional tax) quickly.",
 "icons": {
   "48": "icons/icon48.png",
   "128": "icons/icon128.png"
 },
 "browser_action": {
   "default_popup": "popup.html"
 },
 "permissions": ["activeTab"]

Hi everyone, I recently built a small Firefox extension for my website [https://calcolo-stpendionetto.it https://calcolo-stpendionetto.it] https://calcolo-stpendionetto.it , which helps users calculate their net salary in Italy using updated IRPEF and INPS rates. However, when I try to upload the extension to [https://addons.mozilla.org/en-GB/firefox/?_gl=1*1o2c5hm*_ga*NDg5NTUzODcuMTc1OTUwNzUzNg..*_ga_2VC139B3XV*czE3NTk1ODk5MjIkbzIkZzEkdDE3NTk1OTE0NzYkajYwJGwwJGgw addons.mozilla.org ] addons.mozilla.org (AMO), I keep getting this error message: '''Signing is not possible due to an error with the manifest file''' { "manifest_version": 2, "name": "Calcolo Stipendio Netto", "version": "1.0", "description": "Calculate your Italian net salary (IRPEF, INPS, regional tax) quickly.", "icons": { "48": "icons/icon48.png", "128": "icons/icon128.png" }, "browser_action": { "default_popup": "popup.html" }, "permissions": ["activeTab"] } I also tried switching to manifest_version 3, but then Firefox gave a warning that some properties like browser_action are deprecated or not recognized. Has anyone experienced the same issue when uploading finance or calculator-related extensions? Is there a new manifest format or signing rule I might be missing for Firefox extensions? Any help or examples from working extensions would be greatly appreciated. '''Marien Klin'''