diff --git a/bin/unzip_gecko.py b/bin/unzip_gecko.py
index 6a47f03..362e00f 100644
--- a/bin/unzip_gecko.py
+++ b/bin/unzip_gecko.py
@@ -120,6 +120,10 @@ def untar_gecko(filename="{}/bin/drivers/geckodriver-v0.{}.0-linux{}.tar.gz", ve
     arch_info = {"64bit": "64", "32bit": "32"}
     file_arch = arch_info[platform.architecture()[0]]
     ff_version = lib.core.settings.get_browser_version()
+    if isinstance(ff_version, str) or ff_version is None:
+        ff_version = lib.core.settings.prompt(
+            "enter your firefox browser version (if you don't know it run firefox --version"
+        )
     gecko_version = config_gecko_version(ff_version)
     if gecko_version is None:
         lib.core.settings.logger.fatal(lib.core.settings.set_color(
diff --git a/etc/checksum/md5sum.md5 b/etc/checksum/md5sum.md5
index 23cb037..457761c 100644
--- a/etc/checksum/md5sum.md5
+++ b/etc/checksum/md5sum.md5
@@ -14,7 +14,7 @@ dc7bfc3d7b9b23340ee37806316bd770  ./etc/text_files/xss_payloads.txt
 cd9c70aa862df26e40c42cbe5909a4aa  ./etc/checksum/md5sum.md5
 15b70d0142602288c8d635a6a0ceb665  ./bin/version_info
 d41d8cd98f00b204e9800998ecf8427e  ./bin/__init__.py
-ff2511effe21aa36002f37ed9bfe47ec  ./bin/unzip_gecko.py
+a622b354f81ee5d0bad88c1e8b2ba0f9  ./bin/unzip_gecko.py
 dc1eb4ebe0f372af48b5a9c107ebc68d  ./bin/drivers/geckodriver-v0.18.0-linux32.tar.gz
 be18faeea6e7db9db6990d8667e2298f  ./bin/drivers/geckodriver-v0.17.0-linux64.tar.gz
 79b1a158f96d29942a111c0905f1c807  ./bin/drivers/geckodriver-v0.17.0-linux32.tar.gz