diff --git a/src/resolve-dependency.ts b/src/resolve-dependency.ts
index 826e86c7..3695f5a0 100644
--- a/src/resolve-dependency.ts
+++ b/src/resolve-dependency.ts
@@ -128,7 +128,7 @@ interface PkgCfg {
   main: string | undefined;
   exports: PackageTarget;
   imports: { [key: string]: PackageTarget };
-  browser?: string | { [key: string]: string };
+  browser?: unknown;
 }
 
 async function getPkgCfg(
@@ -259,8 +259,18 @@ async function resolveRemappings(
 ): Promise<void> {
   if (job.conditions?.includes('browser')) {
     const { browser: pkgBrowser } = pkgCfg;
+    if (!pkgBrowser) {
+      return;
+    }
     if (typeof pkgBrowser === 'object') {
       for (const [key, value] of Object.entries(pkgBrowser)) {
+        if (typeof value !== 'string') {
+          /**
+           * `false` can be used to specify that a file is not meant to be included.
+           * Downstream processing is expected to handle this case, and it should remain in the mapping result
+           */
+          continue;
+        }
         if (!key.startsWith('./') || !value.startsWith('./')) {
           continue;
         }
diff --git a/test/unit/browser-remappings-false/.gitignore b/test/unit/browser-remappings-false/.gitignore
new file mode 100644
index 00000000..a9412d2d
--- /dev/null
+++ b/test/unit/browser-remappings-false/.gitignore
@@ -0,0 +1,2 @@
+# include node_modules for testing
+!node_modules 
diff --git a/test/unit/browser-remappings-false/input.js b/test/unit/browser-remappings-false/input.js
new file mode 100644
index 00000000..76b86cf7
--- /dev/null
+++ b/test/unit/browser-remappings-false/input.js
@@ -0,0 +1,2 @@
+require('pkg');
+
diff --git a/test/unit/browser-remappings-false/node_modules/pkg/browser.js b/test/unit/browser-remappings-false/node_modules/pkg/browser.js
new file mode 100644
index 00000000..a5ceac31
--- /dev/null
+++ b/test/unit/browser-remappings-false/node_modules/pkg/browser.js
@@ -0,0 +1 @@
+module.exports = 'browser code';
diff --git a/test/unit/browser-remappings-false/node_modules/pkg/index.js b/test/unit/browser-remappings-false/node_modules/pkg/index.js
new file mode 100644
index 00000000..da058b11
--- /dev/null
+++ b/test/unit/browser-remappings-false/node_modules/pkg/index.js
@@ -0,0 +1,2 @@
+module.exports = 'legacy index';
+require("./browser")
diff --git a/test/unit/browser-remappings-false/node_modules/pkg/package.json b/test/unit/browser-remappings-false/node_modules/pkg/package.json
new file mode 100644
index 00000000..33d8de58
--- /dev/null
+++ b/test/unit/browser-remappings-false/node_modules/pkg/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "pkg",
+  "main": "index.js",
+  "browser": {
+    "./browser.js": false
+  }
+}
diff --git a/test/unit/browser-remappings-false/output.js b/test/unit/browser-remappings-false/output.js
new file mode 100644
index 00000000..bc5f3405
--- /dev/null
+++ b/test/unit/browser-remappings-false/output.js
@@ -0,0 +1,7 @@
+[
+  "package.json",
+  "test/unit/browser-remappings-false/input.js",
+  "test/unit/browser-remappings-false/node_modules/pkg/browser.js",
+  "test/unit/browser-remappings-false/node_modules/pkg/index.js",
+  "test/unit/browser-remappings-false/node_modules/pkg/package.json"
+]
diff --git a/test/unit/browser-remappings-false/test-opts.json b/test/unit/browser-remappings-false/test-opts.json
new file mode 100644
index 00000000..9e01628e
--- /dev/null
+++ b/test/unit/browser-remappings-false/test-opts.json
@@ -0,0 +1,3 @@
+{
+  "conditions": ["browser"]
+}
diff --git a/test/unit/browser-remappings-string/.gitignore b/test/unit/browser-remappings-string/.gitignore
new file mode 100644
index 00000000..a9412d2d
--- /dev/null
+++ b/test/unit/browser-remappings-string/.gitignore
@@ -0,0 +1,2 @@
+# include node_modules for testing
+!node_modules 
diff --git a/test/unit/browser-remappings-string/input.js b/test/unit/browser-remappings-string/input.js
new file mode 100644
index 00000000..76b86cf7
--- /dev/null
+++ b/test/unit/browser-remappings-string/input.js
@@ -0,0 +1,2 @@
+require('pkg');
+
diff --git a/test/unit/browser-remappings-string/node_modules/pkg/browser.js b/test/unit/browser-remappings-string/node_modules/pkg/browser.js
new file mode 100644
index 00000000..a5ceac31
--- /dev/null
+++ b/test/unit/browser-remappings-string/node_modules/pkg/browser.js
@@ -0,0 +1 @@
+module.exports = 'browser code';
diff --git a/test/unit/browser-remappings-string/node_modules/pkg/index.js b/test/unit/browser-remappings-string/node_modules/pkg/index.js
new file mode 100644
index 00000000..41deffde
--- /dev/null
+++ b/test/unit/browser-remappings-string/node_modules/pkg/index.js
@@ -0,0 +1,2 @@
+module.exports = 'legacy index';
+require("pkg/browser")
diff --git a/test/unit/browser-remappings-string/node_modules/pkg/package.json b/test/unit/browser-remappings-string/node_modules/pkg/package.json
new file mode 100644
index 00000000..5300cb04
--- /dev/null
+++ b/test/unit/browser-remappings-string/node_modules/pkg/package.json
@@ -0,0 +1,5 @@
+{
+  "name": "pkg",
+  "main": "index.js",
+  "browser": "./browser.js"
+}
diff --git a/test/unit/browser-remappings-string/output.js b/test/unit/browser-remappings-string/output.js
new file mode 100644
index 00000000..1f3ecac2
--- /dev/null
+++ b/test/unit/browser-remappings-string/output.js
@@ -0,0 +1,7 @@
+[
+  "package.json",
+  "test/unit/browser-remappings-string/input.js",
+  "test/unit/browser-remappings-string/node_modules/pkg/browser.js",
+  "test/unit/browser-remappings-string/node_modules/pkg/index.js",
+  "test/unit/browser-remappings-string/node_modules/pkg/package.json"
+]
diff --git a/test/unit/browser-remappings-string/test-opts.json b/test/unit/browser-remappings-string/test-opts.json
new file mode 100644
index 00000000..9e01628e
--- /dev/null
+++ b/test/unit/browser-remappings-string/test-opts.json
@@ -0,0 +1,3 @@
+{
+  "conditions": ["browser"]
+}
diff --git a/test/unit/browser-remappings-undefined/.gitignore b/test/unit/browser-remappings-undefined/.gitignore
new file mode 100644
index 00000000..a9412d2d
--- /dev/null
+++ b/test/unit/browser-remappings-undefined/.gitignore
@@ -0,0 +1,2 @@
+# include node_modules for testing
+!node_modules 
diff --git a/test/unit/browser-remappings-undefined/input.js b/test/unit/browser-remappings-undefined/input.js
new file mode 100644
index 00000000..76b86cf7
--- /dev/null
+++ b/test/unit/browser-remappings-undefined/input.js
@@ -0,0 +1,2 @@
+require('pkg');
+
diff --git a/test/unit/browser-remappings-undefined/node_modules/pkg/index.js b/test/unit/browser-remappings-undefined/node_modules/pkg/index.js
new file mode 100644
index 00000000..914a7c58
--- /dev/null
+++ b/test/unit/browser-remappings-undefined/node_modules/pkg/index.js
@@ -0,0 +1 @@
+module.exports = 'legacy index';
diff --git a/test/unit/browser-remappings-undefined/node_modules/pkg/package.json b/test/unit/browser-remappings-undefined/node_modules/pkg/package.json
new file mode 100644
index 00000000..a43212cb
--- /dev/null
+++ b/test/unit/browser-remappings-undefined/node_modules/pkg/package.json
@@ -0,0 +1,13 @@
+{
+  "name": "pkg",
+  "main": "index.js",
+  "exports": {
+    ".": {
+      "import": "./subdir/import-main.js",
+      "require": "./require-main.cjs"
+    },
+    "./asdf": {
+      "import": "./subdir/import-main.js"
+    }
+  }
+}
diff --git a/test/unit/browser-remappings-undefined/node_modules/pkg/require-main.cjs b/test/unit/browser-remappings-undefined/node_modules/pkg/require-main.cjs
new file mode 100644
index 00000000..43b69844
--- /dev/null
+++ b/test/unit/browser-remappings-undefined/node_modules/pkg/require-main.cjs
@@ -0,0 +1,2 @@
+import('pkg/asdf');
+module.exports = 'require main';
diff --git a/test/unit/browser-remappings-undefined/node_modules/pkg/subdir/import-main-browser.js b/test/unit/browser-remappings-undefined/node_modules/pkg/subdir/import-main-browser.js
new file mode 100644
index 00000000..72b9016b
--- /dev/null
+++ b/test/unit/browser-remappings-undefined/node_modules/pkg/subdir/import-main-browser.js
@@ -0,0 +1 @@
+export default 'import main browser';
diff --git a/test/unit/browser-remappings-undefined/node_modules/pkg/subdir/import-main.js b/test/unit/browser-remappings-undefined/node_modules/pkg/subdir/import-main.js
new file mode 100644
index 00000000..95bc9efa
--- /dev/null
+++ b/test/unit/browser-remappings-undefined/node_modules/pkg/subdir/import-main.js
@@ -0,0 +1 @@
+export default 'import main';
diff --git a/test/unit/browser-remappings-undefined/node_modules/pkg/subdir/package.json b/test/unit/browser-remappings-undefined/node_modules/pkg/subdir/package.json
new file mode 100644
index 00000000..6990891f
--- /dev/null
+++ b/test/unit/browser-remappings-undefined/node_modules/pkg/subdir/package.json
@@ -0,0 +1 @@
+{"type": "module"}
diff --git a/test/unit/browser-remappings-undefined/output.js b/test/unit/browser-remappings-undefined/output.js
new file mode 100644
index 00000000..f94da2b5
--- /dev/null
+++ b/test/unit/browser-remappings-undefined/output.js
@@ -0,0 +1,9 @@
+[
+  "package.json",
+  "test/unit/browser-remappings-undefined/input.js",
+  "test/unit/browser-remappings-undefined/node_modules/pkg/index.js",
+  "test/unit/browser-remappings-undefined/node_modules/pkg/package.json",
+  "test/unit/browser-remappings-undefined/node_modules/pkg/require-main.cjs",
+  "test/unit/browser-remappings-undefined/node_modules/pkg/subdir/import-main.js",
+  "test/unit/browser-remappings-undefined/node_modules/pkg/subdir/package.json"
+]
diff --git a/test/unit/browser-remappings-undefined/test-opts.json b/test/unit/browser-remappings-undefined/test-opts.json
new file mode 100644
index 00000000..9e01628e
--- /dev/null
+++ b/test/unit/browser-remappings-undefined/test-opts.json
@@ -0,0 +1,3 @@
+{
+  "conditions": ["browser"]
+}
diff --git a/test/unit/browser-remappings/output.js b/test/unit/browser-remappings/output.js
index 9864d640..546aa4a8 100644
--- a/test/unit/browser-remappings/output.js
+++ b/test/unit/browser-remappings/output.js
@@ -7,4 +7,4 @@
   "test/unit/browser-remappings/node_modules/pkg/subdir/import-main-browser.js",
   "test/unit/browser-remappings/node_modules/pkg/subdir/import-main.js",
   "test/unit/browser-remappings/node_modules/pkg/subdir/package.json"
-]
\ No newline at end of file
+]