console.error: duckduckgo_plus:
Message: Module `sdk/webextension` is not found at resource://gre/modules/commonjs/sdk/webextension.js
Stack:
@resource://jid1-zadieub7xozojw-at-jetpack/lib/main.js:46:22
run@resource://gre/modules/commonjs/sdk/addon/runner.js:147:19
startup/</<@resource://gre/modules/commonjs/sdk/addon/runner.js:87:9
Handler.prototype.process@resource://gre/modules/Promise-backend.js:933:23
this.PromiseWalker.walkerLoop@resource://gre/modules/Promise-    backend.js:812:7
this.PromiseWalker.scheduleWalkerLoop/<@resource://gre/modules/Promise-backend.js:746:1

console.error: duckduckgo_plus:
Message: Module `sdk/webextension` is not found at resource://gre/modules/commonjs/sdk/webextension.js
Stack:
@resource://jid1-zadieub7xozojw-at-jetpack/lib/main.js:46:22
run@resource://gre/modules/commonjs/sdk/addon/runner.js:147:19
startup/</<@resource://gre/modules/commonjs/sdk/addon/runner.js:87:9
Handler.prototype.process@resource://gre/modules/Promise-backend.js:933:23
this.PromiseWalker.walkerLoop@resource://gre/modules/Promise-backend.js:812:7
this.PromiseWalker.scheduleWalkerLoop/<@resource://gre/modules/Promise-backend.js:746:1