diff --git a/app/build.gradle b/app/build.gradle
index c7d0116..a85c9ff 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -3,11 +3,11 @@ plugins {
     alias(libs.plugins.android.application)
     alias(libs.plugins.kotlin.android)
     alias(libs.plugins.kotlin.serialization)
-    alias(libs.plugins.google.services)
-    alias(libs.plugins.firebase.perf)
     alias(libs.plugins.ksp)
     id 'kotlin-parcelize'
-//    id 'com.google.firebase.crashlytics'
+    alias(libs.plugins.google.services)
+    alias(libs.plugins.firebase.perf)
+    alias(libs.plugins.firebase.crashlytics)
 }
 
 // Create a variable called keystorePropertiesFile, and initialize it to your
@@ -44,7 +44,7 @@ android {
         release {
             postprocessing {
                 removeUnusedCode true
-                removeUnusedResources true
+//                removeUnusedResources true // causes The Crashlytics build ID is missing for some reason
                 obfuscate true
                 optimizeCode true
                 proguardFile 'proguard-rules.pro'
@@ -87,8 +87,6 @@ dependencies {
     implementation(libs.ksp)
     implementation(libs.androidx.compose)
 
-//    implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
-
     debugImplementation(libs.compose.ui.tooling)
     implementation(libs.compose.ui)
     implementation(libs.compose.ui.util)
@@ -96,6 +94,7 @@ dependencies {
     implementation(libs.compose.material)
     implementation(libs.compose.material.icons.core)
     implementation(libs.compose.material.icons.extended)
+    implementation(libs.compose.ui.tooling)
 
     implementation(libs.accompanist.placeholder)
     implementation(libs.accompanist.flowlayout)
@@ -136,15 +135,16 @@ dependencies {
     implementation libs.kotlinx.serialization.json
 
 //    https://firebase.google.com/support/release-notes/android
-    implementation platform('com.google.firebase:firebase-bom:32.5.0')
+    implementation platform('com.google.firebase:firebase-bom:32.6.0')
 
     implementation 'com.google.firebase:firebase-analytics'
-//    implementation 'com.google.firebase:firebase-crashlytics'
+    implementation 'com.google.firebase:firebase-crashlytics'
     implementation 'com.google.firebase:firebase-perf'
     implementation 'com.google.firebase:firebase-firestore'
     implementation 'com.google.firebase:firebase-messaging'
-    implementation 'com.google.android.gms:play-services-ads:22.5.0'
-    implementation 'com.google.android.ump:user-messaging-platform:2.1.0'
+
+    implementation libs.play.services.ads
+    implementation libs.user.messaging.platform
 
     implementation libs.timber
 
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 12b08f9..22caa83 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,6 +1,5 @@
 <resources>
     <string name="app_name">Mars Rover Photos</string>
-
     <string name="title_activity_image">ImageActivity</string>
     <string name="dummy_button">Dummy Button</string>
     <string name="dummy_content">DUMMY\nCONTENT</string>
diff --git a/build.gradle b/build.gradle
index c876656..369cc54 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,16 +1,11 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
-
-buildscript {
-    ext.kotlin_version = '1.9.20'
-}
-
 plugins {
     alias(libs.plugins.android.application) apply false
     alias(libs.plugins.kotlin.jvm) apply false
     alias(libs.plugins.kotlin.android) apply false
     alias(libs.plugins.google.services) apply false
     alias(libs.plugins.firebase.perf) apply false
-//    id 'com.google.firebase.crashlytics' version '2.9.9' apply false
+    alias(libs.plugins.firebase.crashlytics) apply false
 }
 
 allprojects {
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 8a6fcbc..5614acc 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -28,9 +28,11 @@ mockito = "1.6.0"
 # https://developer.android.com/jetpack/androidx/releases/paging
 paging = "3.3.0-alpha02"
 # https://developer.android.com/jetpack/androidx/releases/room
+playServicesAds = "22.5.0"
 room = "2.6.0"
 # https://developer.android.com/jetpack/androidx/releases/work
 timber = "5.0.1"
+userMessagingPlatform = "2.1.0"
 work = "2.8.1"
 # https://github.com/usuiat/Zoomable/releases
 zoomable = "1.5.1"
@@ -83,6 +85,8 @@ accompanist-placeholder = { group = "com.google.accompanist", name = "accompanis
 accompanist-flowlayout = { group = "com.google.accompanist", name = "accompanist-flowlayout", version.ref = "accompanist" }
 accompanist-systemuicontroller = { group = "com.google.accompanist", name = "accompanist-systemuicontroller", version.ref = "accompanist" }
 
+play-services-ads = { module = "com.google.android.gms:play-services-ads", version.ref = "playServicesAds" }
+user-messaging-platform = { module = "com.google.android.ump:user-messaging-platform", version.ref = "userMessagingPlatform" }
 timber = { module = "com.jakewharton.timber:timber", version.ref = "timber" }
 zoomable = { module = "net.engawapg.lib:zoomable", version.ref = "zoomable" }
 
@@ -94,5 +98,6 @@ kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
 kotlin-parcelize = { id = "org.jetbrains.kotlin.parcelize", version.ref = "kotlin" }
 kotlin-serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin" }
 firebase-perf = { id = "com.google.firebase.firebase-perf", version = "1.4.2" }
+firebase-crashlytics = { id = "com.google.firebase.crashlytics", version = "2.9.9" }
 google-services = { id = "com.google.gms.google-services", version = "4.4.0" }
 ksp = { id = "com.google.devtools.ksp", version.ref = "ksp" }