[instagram] use Chrome User-Agent by default (#6379)

gallery_dl/extractor/instagram.py

@@ -29,6 +29,7 @@ class InstagramExtractor(Extractor):
     root = "https://www.instagram.com"
     cookies_domain = ".instagram.com"
     cookies_names = ("sessionid",)
+    useragent = util.USERAGENT_CHROME
     request_interval = (6.0, 12.0)
 
     def __init__(self, match):

gallery_dl/util.py

@@ -700,6 +700,9 @@ EXECUTABLE = getattr(sys, "frozen", False)
 USERAGENT = "gallery-dl/" + version.__version__
 USERAGENT_FIREFOX = ("Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:{}.0) "
                      "Gecko/20100101 Firefox/{}.0").format(_ff_ver, _ff_ver)
+USERAGENT_CHROME = ("Mozilla/5.0 (Windows NT 10.0; Win64; x64) "
+                    "AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 "
+                    "Safari/537.36")
 SPECIAL_EXTRACTORS = {"oauth", "recursive", "generic"}
 GLOBALS = {
     "contains" : contains,