Here is the error message:
Unrecognized manifest key applications
{
"applications": {
"gecko": {
"id": "[email protected]"
}
},
"background": {
"persistent": false,
"scripts": [ "vendor/tinycolor-1.4.1.min.js", "background.js" ]
},
"content_scripts": [ {
"js": [ "vendor/jquery-3.3.1.min.js", "contentScript.js" ],
"matches": [ "https://mail.google.com/mail/*" ],
"run_at": "document_start"
} ],
"description": "Automatically shows trimmed content in Google Mail™.",
"icons": {
"128": "images/icon-128.png",
"16": "images/icon-16.png",
"48": "images/icon-48.png"
},
"key": "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCq2+Jg/3mM/9KELc+n31TgvoSp1eTiLcOtgKMGqf9PQsPKcKBN6EFib8ZN8wQuvtdOiFdxuooiR+17yMsWUU/wxp8pu2tyyb611MirNFQTd5jdw6GjEz+nFPvJ9ik4Vs1Xnxi9sohd4Eo5hIiThfQWu9DffUXlS7WYSesURa70oQIDAQAB",
"manifest_version": 2,
"name": "Trimless for Google Mail™",
"options_ui": {
"chrome_style": true,
"page": "options.html"
},
"page_action": {
"default_icon": {
"19": "images/icon-action-19.png",
"38": "images/icon-action-38.png"
},
"default_title": "Trimless"
},
"permissions": [ "storage" ],
"short_name": "Trimless Gmail",
"update_url": "https://clients2.google.com/service/update2/crx",
"version": "1.11.1"
}