diff --git a/.travis.yml b/.travis.yml
index 3fa03ab9f..c4285a5f4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,3 @@
-sudo: false
 dist: xenial
 language: php
 
@@ -6,7 +5,7 @@ services:
   - mysql
   - postgresql
   - memcached
-  - redis-server
+  - redis
 
 php:
   - 7.1
@@ -15,13 +14,13 @@ php:
   - 7.4
 
 env:
-  matrix:
+  jobs:
     - DB=mysql
     - DB=sqlite
     - DB=pgsql
     - DB=memory
 
-matrix:
+jobs:
   fast_finish: true
 
 cache:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c3c52ffdc..767b7e973 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [v4.4.2]
+
+### Fixed
+- Locale matcher can fail when client provided locale identifier has incorrect casing ([#1087])
+- Sprunje applyTransformations method not returning the $collections object ([#1068])
+- Old assets in `app/assets/browser_modules` not being deleted during install ([#1092])
+- Added `SKIP_PERMISSION_CHECK` env to skip check for local directories that needs to be write protected. This can be used for local production env testing.
+
 ## [v4.4.1]
 
 ### Fixed
@@ -948,8 +956,11 @@ See [http://learn.userfrosting.com/upgrading/40-to-41](Upgrading 4.0.x to 4.1.x
 [#1057]: https://github.com/userfrosting/UserFrosting/issues/1057
 [#1061]: https://github.com/userfrosting/UserFrosting/issues/1061
 [#1062]: https://github.com/userfrosting/UserFrosting/issues/1062
+[#1068]: https://github.com/userfrosting/UserFrosting/issues/1068
 [#1073]: https://github.com/userfrosting/UserFrosting/issues/1073
 [#1078]: https://github.com/userfrosting/UserFrosting/issues/1078
+[#1087]: https://github.com/userfrosting/UserFrosting/issues/1087
+[#1092]: https://github.com/userfrosting/UserFrosting/issues/1092
 
 [v4.2.0]: https://github.com/userfrosting/UserFrosting/compare/v4.1.22...v4.2.0
 [v4.2.1]: https://github.com/userfrosting/UserFrosting/compare/v4.2.0...v.4.2.1
@@ -960,3 +971,5 @@ See [http://learn.userfrosting.com/upgrading/40-to-41](Upgrading 4.0.x to 4.1.x
 [v4.3.2]: https://github.com/userfrosting/UserFrosting/compare/v4.3.1...v4.3.2
 [v4.3.3]: https://github.com/userfrosting/UserFrosting/compare/v4.3.2...v4.3.3
 [v4.4.0]: https://github.com/userfrosting/UserFrosting/compare/v4.3.3...v4.4.0
+[v4.4.1]: https://github.com/userfrosting/UserFrosting/compare/v4.4.0...v4.4.1
+[v4.4.2]: https://github.com/userfrosting/UserFrosting/compare/v4.4.1...v4.4.2
diff --git a/app/sprinkles/core/src/I18n/SiteLocale.php b/app/sprinkles/core/src/I18n/SiteLocale.php
index 97b4447d5..71c61f11f 100644
--- a/app/sprinkles/core/src/I18n/SiteLocale.php
+++ b/app/sprinkles/core/src/I18n/SiteLocale.php
@@ -169,7 +169,10 @@ protected function getBrowserLocale(): ?string
                     $identifier = trim(str_replace('-', '_', $parts[0]));
 
                     // Ensure locale available
-                    if (in_array(strtolower($identifier), array_map('strtolower', $availableLocales))) {
+                    $localeIndex = array_search(strtolower($identifier), array_map('strtolower', $availableLocales));
+
+                    if ($localeIndex !== false) {
+                        $matchedLocale = $availableLocales[$localeIndex];
 
                         // Determine preference level (q=0.x), and add to $foundLocales
                         // If no preference level, set as 1
@@ -181,7 +184,7 @@ protected function getBrowserLocale(): ?string
                         }
 
                         // Add to list, and format for UF's i18n.
-                        $foundLocales[$identifier] = $preference;
+                        $foundLocales[$matchedLocale] = $preference;
                     }
                 }
             }
diff --git a/app/sprinkles/core/src/Sprunje/Sprunje.php b/app/sprinkles/core/src/Sprunje/Sprunje.php
index 3d782d784..35391159d 100644
--- a/app/sprinkles/core/src/Sprunje/Sprunje.php
+++ b/app/sprinkles/core/src/Sprunje/Sprunje.php
@@ -11,6 +11,8 @@
 namespace UserFrosting\Sprinkle\Core\Sprunje;
 
 use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Support\Arr;
+use Illuminate\Support\Str;
 use League\Csv\Writer;
 use Psr\Http\Message\ResponseInterface as Response;
 use UserFrosting\Sprinkle\Core\Util\ClassMapper;
@@ -48,7 +50,7 @@ abstract class Sprunje
     /**
      * Default HTTP request parameters.
      *
-     * @var array[string]
+     * @var array<string,mixed>
      */
     protected $options = [
         'sorts'   => [],
@@ -62,28 +64,28 @@ abstract class Sprunje
     /**
      * Fields to allow filtering upon.
      *
-     * @var array[string]
+     * @var string[]
      */
     protected $filterable = [];
 
     /**
      * Fields to allow listing (enumeration) upon.
      *
-     * @var array[string]
+     * @var string[]
      */
     protected $listable = [];
 
     /**
      * Fields to allow sorting upon.
      *
-     * @var array[string]
+     * @var string[]
      */
     protected $sortable = [];
 
     /**
      * List of fields to exclude when processing an "_all" filter.
      *
-     * @var array[string]
+     * @var string[]
      */
     protected $excludeForAll = [];
 
@@ -227,7 +229,7 @@ public function getArray()
     /**
      * Run the query and build a CSV object by flattening the resulting collection.  Ignores any pagination.
      *
-     * @return \SplTempFileObject
+     * @return Writer
      */
     public function getCsv()
     {
@@ -242,7 +244,7 @@ public function getCsv()
         $collection = collect($filteredQuery->get());
 
         // Perform any additional transformations on the dataset
-        $this->applyTransformations($collection);
+        $collection = $this->applyTransformations($collection);
 
         $csv = Writer::createFromFileObject(new \SplTempFileObject());
 
@@ -250,7 +252,7 @@ public function getCsv()
 
         // Flatten collection while simultaneously building the column names from the union of each element's keys
         $collection->transform(function ($item, $key) use (&$columnNames) {
-            $item = array_dot($item->toArray());
+            $item = Arr::dot($item->toArray());
             foreach ($item as $itemKey => $itemValue) {
                 if (!in_array($itemKey, $columnNames)) {
                     $columnNames[] = $itemKey;
@@ -311,7 +313,7 @@ public function getModels()
         $collection = collect($filteredQuery->get());
 
         // Perform any additional transformations on the dataset
-        $this->applyTransformations($collection);
+        $collection = $this->applyTransformations($collection);
 
         return [$count, $countFiltered, $collection];
     }
@@ -319,7 +321,7 @@ public function getModels()
     /**
      * Get lists of values for specified fields in 'lists' option, calling a custom lister callback when appropriate.
      *
-     * @return array
+     * @return array<string,mixed>
      */
     public function getListable()
     {
@@ -327,7 +329,7 @@ public function getListable()
         foreach ($this->listable as $name) {
 
             // Determine if a custom filter method has been defined
-            $methodName = 'list' . studly_case($name);
+            $methodName = 'list' . Str::studly($name);
 
             if (method_exists($this, $methodName)) {
                 $result[$name] = $this->$methodName();
@@ -408,7 +410,7 @@ public function applySorts($query)
             }
 
             // Determine if a custom sort method has been defined
-            $methodName = 'sort' . studly_case($name);
+            $methodName = 'sort' . Str::studly($name);
 
             if (method_exists($this, $methodName)) {
                 $this->$methodName($query, $direction);
@@ -453,7 +455,7 @@ public function applyPagination($query)
     protected function filterAll($query, $value)
     {
         foreach ($this->filterable as $name) {
-            if (studly_case($name) != 'all' && !in_array($name, $this->excludeForAll)) {
+            if (Str::studly($name) != 'all' && !in_array($name, $this->excludeForAll)) {
                 // Since we want to match _any_ of the fields, we wrap the field callback in a 'orWhere' callback
                 $query->orWhere(function ($fieldQuery) use ($name, $value) {
                     $this->buildFilterQuery($fieldQuery, $name, $value);
@@ -475,7 +477,7 @@ protected function filterAll($query, $value)
      */
     protected function buildFilterQuery($query, $name, $value)
     {
-        $methodName = 'filter' . studly_case($name);
+        $methodName = 'filter' . Str::studly($name);
 
         // Determine if a custom filter method has been defined
         if (method_exists($this, $methodName)) {
@@ -512,9 +514,9 @@ protected function buildFilterDefaultFieldQuery($query, $name, $value)
     /**
      * Set any transformations you wish to apply to the collection, after the query is executed.
      *
-     * @param \Illuminate\Database\Eloquent\Collection $collection
+     * @param \Illuminate\Support\Collection $collection
      *
-     * @return \Illuminate\Database\Eloquent\Collection
+     * @return \Illuminate\Support\Collection
      */
     protected function applyTransformations($collection)
     {
@@ -534,7 +536,7 @@ abstract protected function baseQuery();
      *
      * @param string $column
      *
-     * @return array
+     * @return array<array<string,mixed>>
      */
     protected function getColumnValues($column)
     {
diff --git a/app/sprinkles/core/src/Twig/CoreExtension.php b/app/sprinkles/core/src/Twig/CoreExtension.php
index f00ff390f..d7f18ae59 100755
--- a/app/sprinkles/core/src/Twig/CoreExtension.php
+++ b/app/sprinkles/core/src/Twig/CoreExtension.php
@@ -40,30 +40,21 @@ public function __construct(ContainerInterface $services)
         $this->services = $services;
     }
 
-    /**
-     * Get the name of this extension.
-     *
-     * @return string
-     */
-    public function getName()
-    {
-        return 'userfrosting/core';
-    }
-
     /**
      * Adds Twig functions `getAlerts` and `translate`.
      *
-     * @return array[TwigFunction]
+     * @return TwigFunction[]
      */
     public function getFunctions()
     {
         return [
             // Add Twig function for fetching alerts
             new TwigFunction('getAlerts', function ($clear = true) {
+                $alerts = $this->services->alerts;
                 if ($clear) {
-                    return $this->services['alerts']->getAndClearMessages();
+                    return $alerts->getAndClearMessages();
                 } else {
-                    return $this->services['alerts']->messages();
+                    return $alerts->messages();
                 }
             }),
             new TwigFunction('translate', function ($hook, $params = []) {
@@ -77,7 +68,7 @@ public function getFunctions()
     /**
      * Adds Twig filters `unescape`.
      *
-     * @return array[TwigFilter]
+     * @return TwigFilter[]
      */
     public function getFilters()
     {
diff --git a/app/sprinkles/core/src/Util/CheckEnvironment.php b/app/sprinkles/core/src/Util/CheckEnvironment.php
index 599c5fdaa..055fe4ec8 100644
--- a/app/sprinkles/core/src/Util/CheckEnvironment.php
+++ b/app/sprinkles/core/src/Util/CheckEnvironment.php
@@ -311,7 +311,7 @@ public function checkPermissions()
             $this->locator->findResource('session://') => true,
         ];
 
-        if ($this->isProduction()) {
+        if ($this->isProduction() && !$this->skipPermissionsCheck()) {
             // Should be write-protected in production!
             $shouldBeWriteable = array_merge($shouldBeWriteable, [
                 \UserFrosting\SPRINKLES_DIR => false,
@@ -384,4 +384,14 @@ public function isProduction()
     {
         return getenv('UF_MODE') == 'production';
     }
+
+    /**
+     * Determine whether or not directory that required write-protection in production mode should be checked.
+     *
+     * @return bool True if we should skip the check, false will proceed.
+     */
+    public function skipPermissionsCheck()
+    {
+        return getenv('SKIP_PERMISSION_CHECK') ? true : false;
+    }
 }
diff --git a/app/sprinkles/core/tests/Integration/I18n/SiteLocaleTest.php b/app/sprinkles/core/tests/Integration/I18n/SiteLocaleTest.php
index 88c5779bf..15746ea7e 100644
--- a/app/sprinkles/core/tests/Integration/I18n/SiteLocaleTest.php
+++ b/app/sprinkles/core/tests/Integration/I18n/SiteLocaleTest.php
@@ -168,8 +168,35 @@ public function testGetLocaleIndentifierWithBrowserAndComplexLocale(): void
 
         $this->ci->config['site.locales.default'] = 'fr_FR';
         $this->ci->request = $request;
+
+        /** @var SiteLocale */
         $service = $this->ci->locale;
-        $this->assertSame('en_US', $service->getLocaleIndentifier());
+
+        // Get locale
+        $locale = $service->getLocaleIndentifier();
+
+        // Assertions
+        $this->assertSame('en_US', $locale);
+        $this->assertTrue($service->isAvailable($locale));
+    }
+
+    public function testGetLocaleIndentifierWithBrowserAndComplexLocaleInLowerCase(): void
+    {
+        $request = m::mock(\Psr\Http\Message\ServerRequestInterface::class);
+        $request->shouldReceive('hasHeader')->with('Accept-Language')->once()->andReturn(true);
+        $request->shouldReceive('getHeaderLine')->with('Accept-Language')->once()->andReturn('en-us, en;q=0.9, fr;q=0.8, de;q=0.7, *;q=0.5');
+
+        $this->ci->config['site.locales.default'] = 'fr_FR';
+        $this->ci->request = $request;
+
+        /** @var SiteLocale */
+        $service = $this->ci->locale;
+
+        // Get locale
+        $locale = $service->getLocaleIndentifier();
+
+        $this->assertSame('en_US', $locale);
+        $this->assertTrue($service->isAvailable($locale));
     }
 
     public function testGetLocaleIndentifierWithBrowserAndMultipleLocale(): void
diff --git a/app/sprinkles/core/tests/Integration/Twig/CoreExtensionTest.php b/app/sprinkles/core/tests/Integration/Twig/CoreExtensionTest.php
new file mode 100644
index 000000000..550b8cfb1
--- /dev/null
+++ b/app/sprinkles/core/tests/Integration/Twig/CoreExtensionTest.php
@@ -0,0 +1,82 @@
+<?php
+
+/*
+ * UserFrosting (http://www.userfrosting.com)
+ *
+ * @link      https://github.com/userfrosting/UserFrosting
+ * @copyright Copyright (c) 2019 Alexander Weissman
+ * @license   https://github.com/userfrosting/UserFrosting/blob/master/LICENSE.md (MIT License)
+ */
+
+namespace UserFrosting\Sprinkle\Core\Tests\Integration\Twig;
+
+use Mockery;
+use UserFrosting\Sprinkle\Core\Alert\AlertStream;
+use UserFrosting\Sprinkle\Core\I18n\SiteLocale;
+use UserFrosting\Tests\TestCase;
+
+/**
+ * CoreExtensionTest class.
+ * Tests Core twig extentions
+ */
+class CoreExtensionTest extends TestCase
+{
+    public function tearDown(): void
+    {
+        parent::tearDown();
+        Mockery::close();
+    }
+
+    public function testGetAlerts(): void
+    {
+        $this->ci->alerts = Mockery::mock(AlertStream::class)->shouldReceive('getAndClearMessages')->once()->andReturn([
+            ['message' => 'foo'],
+            ['message' => 'bar'],
+        ])->getMock();
+
+        $result = $this->ci->view->fetchFromString('{% for alert in getAlerts() %}{{alert.message}}{% endfor %}');
+        $this->assertSame('foobar', $result);
+    }
+
+    public function testGetAlertsNoClear(): void
+    {
+        $this->ci->alerts = Mockery::mock(AlertStream::class)->shouldReceive('messages')->once()->andReturn([
+            ['message' => 'foo'],
+            ['message' => 'bar'],
+        ])->getMock();
+
+        $result = $this->ci->view->fetchFromString('{% for alert in getAlerts(false) %}{{alert.message}}{% endfor %}');
+        $this->assertSame('foobar', $result);
+    }
+
+    /**
+     * @see https://github.com/userfrosting/UserFrosting/issues/1090
+     */
+    public function testTranslateFunction(): void
+    {
+        $result = $this->ci->view->fetchFromString('{{ translate("USER", 2) }}');
+        $this->assertSame('Users', $result);
+    }
+
+    public function testPhoneFilter(): void
+    {
+        $result = $this->ci->view->fetchFromString('{{ data|phone }}', ['data' => '5551234567']);
+        $this->assertSame('(555) 123-4567', $result);
+    }
+
+    public function testUnescapeFilter(): void
+    {
+        $string = "I'll \"walk\" the <b>dog</b> now";
+        $this->assertNotSame($string, $this->ci->view->fetchFromString("{{ foo }}", ['foo' => htmlentities($string)]));
+        $this->assertNotSame($string, $this->ci->view->fetchFromString("{{ foo|unescape }}", ['foo' => htmlentities($string)]));
+        $this->assertNotSame($string, $this->ci->view->fetchFromString("{{ foo|raw }}", ['foo' => htmlentities($string)]));
+        $this->assertSame($string, $this->ci->view->fetchFromString("{{ foo|unescape|raw }}", ['foo' => htmlentities($string)]));
+    }
+
+    public function testCurrentLocaleGlobal(): void
+    {
+        $this->ci->locale = Mockery::mock(SiteLocale::class)->shouldReceive('getLocaleIndentifier')->once()->andReturn('zz-ZZ')->getMock();
+
+        $this->assertSame('zz-ZZ', $this->ci->view->fetchFromString("{{ currentLocale }}"));
+    }
+}
diff --git a/app/sprinkles/core/tests/Unit/Sprunje/SprunjeTest.php b/app/sprinkles/core/tests/Unit/Sprunje/SprunjeTest.php
index d2a0c3678..7cf21e018 100644
--- a/app/sprinkles/core/tests/Unit/Sprunje/SprunjeTest.php
+++ b/app/sprinkles/core/tests/Unit/Sprunje/SprunjeTest.php
@@ -66,6 +66,25 @@ public function testSprunjeApplySortsDefault()
         $builder->shouldReceive('orderBy')->once()->with('species', 'asc');
         $sprunje->applySorts($builder);
     }
+
+    public function testSprunjeApplyTransformations(): void
+    {
+        $sprunje = new SprunjeStub([]);
+
+        $builder = $sprunje->getQuery();
+        $builder->shouldReceive('count')->andReturn(2);
+        $builder->shouldReceive('get')->andReturn([
+            ['id' => '1', 'name' => 'Foo'],
+            ['id' => '2', 'name' => 'Bar'],
+        ]);
+
+        $result = $sprunje->getModels();
+
+        $this->assertSame([
+            ['id' => '1', 'name' => 'FooFoo'],
+            ['id' => '2', 'name' => 'BarBar'],
+        ], $result[2]->toArray());
+    }
 }
 
 class SprunjeStub extends Sprunje
@@ -93,6 +112,17 @@ protected function baseQuery()
 
         return $builder;
     }
+
+    protected function applyTransformations($collection)
+    {
+        $collection = $collection->map(function ($item, $key) {
+            $item['name'] = $item['name'] . $item['name'];
+
+            return $item;
+        });
+
+        return $collection;
+    }
 }
 
 class SprunjeTestModelStub extends Model
diff --git a/build/tasks/assets-install.js b/build/tasks/assets-install.js
index 092e103cc..85843a529 100644
--- a/build/tasks/assets-install.js
+++ b/build/tasks/assets-install.js
@@ -90,7 +90,7 @@ export async function assetsInstall() {
 
         // Browserify dependencies
         log.info("Compiling compatible node modules into UMD bundles with browserify");
-        deleteSync(vendorAssetsDir + "browserify_modules/", { force: true });
+        deleteSync(vendorAssetsDir + "browser_modules/", { force: true });
         await browserifyDependencies({
             dependencies: Object.keys(pkg.dependencies),
             inputDir: vendorAssetsDir + "node_modules/",