Add support for impersonating Firefox 100

Add support for impersonating Firefox 100. The TLS signature is identical to
previous versions of Firefox.

In addition, upgrade NSS (Firefox's TLS library) to version 3.77 used by
Firefox 100. This is not strictly necessary as the previous version used
works just fine, but it's better keep up with the newest version.

firefox/patches/curl-impersonate.patch

@@ -216,7 +216,7 @@ index 769363941..6e2f1b829 100644
  
  CHECKSRC = $(CS_$(V))
 diff --git a/lib/easy.c b/lib/easy.c
-index 20293a710..f08403bc0 100644
+index 20293a710..87acdb814 100644
 --- a/lib/easy.c
 +++ b/lib/easy.c
 @@ -80,6 +80,7 @@
@@ -227,7 +227,7 @@ index 20293a710..f08403bc0 100644
  
  /* The last 3 #include files should be in this order */
  #include "curl_printf.h"
-@@ -282,6 +283,202 @@ void curl_global_cleanup(void)
+@@ -282,6 +283,237 @@ void curl_global_cleanup(void)
    init_flags  = 0;
  }
  
@@ -351,6 +351,41 @@ index 20293a710..f08403bc0 100644
 +      "Sec-Fetch-User: ?1",
 +      "TE: Trailers"
 +    }
++  },
++  {
++    .target = "ff100",
++    .httpversion = CURL_HTTP_VERSION_2_0,
++    .ssl_version = CURL_SSLVERSION_TLSv1_2 | CURL_SSLVERSION_MAX_DEFAULT,
++    .ciphers =
++      "aes_128_gcm_sha_256,"
++      "chacha20_poly1305_sha_256,"
++      "aes_256_gcm_sha_384,"
++      "ecdhe_ecdsa_aes_128_gcm_sha_256,"
++      "ecdhe_rsa_aes_128_gcm_sha_256,"
++      "ecdhe_ecdsa_chacha20_poly1305_sha_256,"
++      "ecdhe_rsa_chacha20_poly1305_sha_256,"
++      "ecdhe_ecdsa_aes_256_gcm_sha_384,"
++      "ecdhe_rsa_aes_256_gcm_sha_384,"
++      "ecdhe_ecdsa_aes_256_sha,"
++      "ecdhe_ecdsa_aes_128_sha,"
++      "ecdhe_rsa_aes_128_sha,"
++      "ecdhe_rsa_aes_256_sha,"
++      "rsa_aes_128_gcm_sha_256,"
++      "rsa_aes_256_gcm_sha_384,"
++      "rsa_aes_128_sha,"
++      "rsa_aes_256_sha",
++    .http_headers = {
++      "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:100.0) Gecko/20100101 Firefox/100.0",
++      "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8",
++      "Accept-Language: en-US,en;q=0.5",
++      "Accept-Encoding: gzip, deflate, br",
++      "Upgrade-Insecure-Requests: 1",
++      "Sec-Fetch-Dest: document",
++      "Sec-Fetch-Mode: navigate",
++      "Sec-Fetch-Site: none",
++      "Sec-Fetch-User: ?1",
++      "TE: Trailers"
++    }
 +  }
 +};
 +
@@ -430,7 +465,7 @@ index 20293a710..f08403bc0 100644
  /*
   * curl_easy_init() is the external interface to alloc, setup and init an
   * easy handle that is returned. If anything goes wrong, NULL is returned.
-@@ -290,6 +487,7 @@ struct Curl_easy *curl_easy_init(void)
+@@ -290,6 +522,7 @@ struct Curl_easy *curl_easy_init(void)
  {
    CURLcode result;
    struct Curl_easy *data;
@@ -438,7 +473,7 @@ index 20293a710..f08403bc0 100644
  
    /* Make sure we inited the global SSL stuff */
    if(!initialized) {
-@@ -308,6 +506,22 @@ struct Curl_easy *curl_easy_init(void)
+@@ -308,6 +541,22 @@ struct Curl_easy *curl_easy_init(void)
      return NULL;
    }
  
@@ -461,7 +496,7 @@ index 20293a710..f08403bc0 100644
    return data;
  }
  
-@@ -878,6 +1092,13 @@ struct Curl_easy *curl_easy_duphandle(struct Curl_easy *data)
+@@ -878,6 +1127,13 @@ struct Curl_easy *curl_easy_duphandle(struct Curl_easy *data)
      outcurl->state.referer_alloc = TRUE;
    }