Fix for Firefox

build.sh

@@ -1,20 +1,21 @@
 #!/bin/bash
 
-set -eux
+set -euo pipefail
 
 NAME="view-background-image"
 VERSION="$(jq -r .version src/manifest.json)"
 
+rm -rf dist
 mkdir -p dist
-rm dist/*.zip
 
 # for Chrome
+./manifest.sh chrome
 zip -r "dist/${NAME}-${VERSION}-chrome.zip" src -x "*.DS_Store"
 
 # for Firefox
+./manifest.sh firefox
 cd src
-sed -i -e 's/"service_worker": "background.js"/"scripts": \["background.js"\]/' manifest.json
-
 zip -r "../dist/${NAME}-${VERSION}-firefox.zip" * -x "*.DS_Store"
 
-sed -i -e 's/"scripts": \["background.js"\]/"service_worker": "background.js"/' manifest.json
+cd ..
+./manifest.sh chrome

manifest.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+set -euo pipefail
+
+case "$1" in
+  'chrome')
+    jq '.background|={"service_worker": "background.js"}' < src/manifest.json | \
+    jq 'del(.browser_specific_settings)' > tmp/manifest.json
+    mv tmp/manifest.json src/manifest.json
+    yarn prettier --write src/manifest.json
+    ;;
+  'firefox')
+    jq '.background|={"scripts": ["background.js"]}' < src/manifest.json |
+    jq '.browser_specific_settings|={"gecko":{"id":"{f1f7b448-d666-46c6-9dfa-3ee4c5c83578}"}}' > tmp/manifest.json
+    mv tmp/manifest.json src/manifest.json
+    yarn prettier --write src/manifest.json
+    ;;
+  *)
+    echo 'Unknown argument'
+    ;;
+esac