diff --git a/ext/bg/background.html b/ext/bg/background.html
index b3067b1e..218e9925 100644
--- a/ext/bg/background.html
+++ b/ext/bg/background.html
@@ -38,7 +38,7 @@
         <script src="/bg/js/json-schema.js"></script>
         <script src="/bg/js/media-utility.js"></script>
         <script src="/bg/js/options.js"></script>
-        <script src="/bg/js/profile-conditions2.js"></script>
+        <script src="/bg/js/profile-conditions.js"></script>
         <script src="/bg/js/request-builder.js"></script>
         <script src="/bg/js/template-renderer.js"></script>
         <script src="/bg/js/text-source-map.js"></script>
diff --git a/ext/bg/js/conditions.js b/ext/bg/js/conditions.js
deleted file mode 100644
index 3f3c0a45..00000000
--- a/ext/bg/js/conditions.js
+++ /dev/null
@@ -1,145 +0,0 @@
-/*
- * Copyright (C) 2019-2020  Yomichan Authors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-
-function conditionsValidateOptionValue(object, value) {
-    if (hasOwn(object, 'validate') && !object.validate(value)) {
-        throw new Error('Invalid value for condition');
-    }
-
-    if (hasOwn(object, 'transform')) {
-        value = object.transform(value);
-
-        if (hasOwn(object, 'validateTransformed') && !object.validateTransformed(value)) {
-            throw new Error('Invalid value for condition');
-        }
-    }
-
-    return value;
-}
-
-function conditionsValidateOptionInputValue(object, value) {
-    if (hasOwn(object, 'transformInput')) {
-        return object.transformInput(value);
-    }
-
-    return null;
-}
-
-function conditionsNormalizeOptionValue(descriptors, type, operator, optionValue, isInput) {
-    if (!hasOwn(descriptors, type)) {
-        throw new Error('Invalid type');
-    }
-
-    const conditionDescriptor = descriptors[type];
-    if (!hasOwn(conditionDescriptor.operators, operator)) {
-        throw new Error('Invalid operator');
-    }
-
-    const operatorDescriptor = conditionDescriptor.operators[operator];
-
-    const descriptorArray = [conditionDescriptor, operatorDescriptor];
-
-    let transformedValue = optionValue;
-
-    let inputTransformedValue = null;
-    if (isInput) {
-        for (const descriptor of descriptorArray) {
-            let value = inputTransformedValue !== null ? inputTransformedValue : transformedValue;
-            value = conditionsValidateOptionInputValue(descriptor, value);
-            if (value !== null) {
-                inputTransformedValue = value;
-            }
-        }
-
-        if (inputTransformedValue !== null) {
-            transformedValue = inputTransformedValue;
-        }
-    }
-
-    for (const descriptor of descriptorArray) {
-        transformedValue = conditionsValidateOptionValue(descriptor, transformedValue);
-    }
-
-    if (hasOwn(operatorDescriptor, 'transformReverse')) {
-        transformedValue = operatorDescriptor.transformReverse(transformedValue);
-    }
-
-    return [transformedValue, inputTransformedValue];
-}
-
-function conditionsTestValueThrowing(descriptors, type, operator, optionValue, value) {
-    if (!hasOwn(descriptors, type)) {
-        throw new Error('Invalid type');
-    }
-
-    const conditionDescriptor = descriptors[type];
-    if (!hasOwn(conditionDescriptor.operators, operator)) {
-        throw new Error('Invalid operator');
-    }
-
-    const operatorDescriptor = conditionDescriptor.operators[operator];
-    if (hasOwn(operatorDescriptor, 'transform')) {
-        if (hasOwn(operatorDescriptor, 'transformCache')) {
-            const key = `${optionValue}`;
-            const transformCache = operatorDescriptor.transformCache;
-            if (hasOwn(transformCache, key)) {
-                optionValue = transformCache[key];
-            } else {
-                optionValue = operatorDescriptor.transform(optionValue);
-                transformCache[key] = optionValue;
-            }
-        } else {
-            optionValue = operatorDescriptor.transform(optionValue);
-        }
-    }
-
-    return operatorDescriptor.test(value, optionValue);
-}
-
-function conditionsTestValue(descriptors, type, operator, optionValue, value) {
-    try {
-        return conditionsTestValueThrowing(descriptors, type, operator, optionValue, value);
-    } catch (e) {
-        return false;
-    }
-}
-
-function conditionsClearCaches(descriptors) {
-    for (const type in descriptors) {
-        if (!hasOwn(descriptors, type)) {
-            continue;
-        }
-
-        const conditionDescriptor = descriptors[type];
-        if (hasOwn(conditionDescriptor, 'transformCache')) {
-            conditionDescriptor.transformCache = {};
-        }
-
-        const operatorDescriptors = conditionDescriptor.operators;
-        for (const operator in operatorDescriptors) {
-            if (!hasOwn(operatorDescriptors, operator)) {
-                continue;
-            }
-
-            const operatorDescriptor = operatorDescriptors[operator];
-            if (hasOwn(operatorDescriptor, 'transformCache')) {
-                operatorDescriptor.transformCache = {};
-            }
-        }
-    }
-}
diff --git a/ext/bg/js/profile-conditions2.js b/ext/bg/js/profile-conditions.js
similarity index 100%
rename from ext/bg/js/profile-conditions2.js
rename to ext/bg/js/profile-conditions.js
diff --git a/test/test-profile-conditions.js b/test/test-profile-conditions.js
index d7402acf..23bbdacb 100644
--- a/test/test-profile-conditions.js
+++ b/test/test-profile-conditions.js
@@ -24,7 +24,7 @@ vm.execute([
     'mixed/js/core.js',
     'mixed/js/cache-map.js',
     'bg/js/json-schema.js',
-    'bg/js/profile-conditions2.js'
+    'bg/js/profile-conditions.js'
 ]);
 const [JsonSchemaValidator, ProfileConditions] = vm.get(['JsonSchemaValidator', 'ProfileConditions']);