diff --git a/src/BackgroundRenderer.cc b/src/BackgroundRenderer.cc
index 2a6dd3f..aad7f99 100644
--- a/src/BackgroundRenderer.cc
+++ b/src/BackgroundRenderer.cc
@@ -18,6 +18,6 @@ void BackgroundRenderer::drawChar(GfxState *state, double x, double y,
   double originX, double originY,
   CharCode code, int nBytes, Unicode *u, int uLen)
 {
-//    SplashOutputDev::drawChar(state,x,y,dx,dy,originX,originY,code, nBytes, u, uLen);
+    SplashOutputDev::drawChar(state,x,y,dx,dy,originX,originY,code, nBytes, u, uLen);
 }
 
diff --git a/src/HTMLRenderer/install.cc b/src/HTMLRenderer/install.cc
index bc61763..0096845 100644
--- a/src/HTMLRenderer/install.cc
+++ b/src/HTMLRenderer/install.cc
@@ -251,9 +251,9 @@ void HTMLRenderer::install_embedded_font(GfxFont * font, const string & suffix,
     if(ctu)
         ctu->decRefCnt();
 
-    auto dest = ((param->single_html ? tmp_dir : dest_dir) / (fn+".ttf"));
+    auto dest = ((param->single_html ? tmp_dir : dest_dir) / (fn+(param->font_suffix)));
     if(param->single_html)
-        add_tmp_file(fn+".ttf");
+        add_tmp_file(fn+(param->font_suffix));
 
     script_fout << format("Generate(%1%)") % dest << endl;
     script_fout << "Close()" << endl;
@@ -267,6 +267,17 @@ void HTMLRenderer::install_embedded_font(GfxFont * font, const string & suffix,
         }
     }
 
+
+    /*
+     * Firefox & Chrome interprets the values in different ways
+     * Trying to unify them 
+     */
+    script_fout << "a=GetOS2Value(\"TypoAscent\")" << endl;
+    script_fout << "d=GetOS2Value(\"TypoDescent\")" << endl;
+    script_fout << "SetOS2Value(\"TypoAscent\", 0)" << endl;
+    script_fout << "SetOS2Value(\"TypoDescent\", -a-d)" << endl;
+    script_fout << format("Generate(%1%)") % dest << endl;
+
     if(system((boost::format("fontforge -script %1% 1>%2% 2>%3%") % script_path % (tmp_dir / (fn+".info")) % (tmp_dir / NULL_FILENAME)).str().c_str()) != 0)
         cerr << "Warning: fontforge failed." << endl;
 
@@ -302,7 +313,7 @@ void HTMLRenderer::install_embedded_font(GfxFont * font, const string & suffix,
         cerr << "Ascent: " << info.ascent << " Descent: " << info.descent << endl;
     }
 
-    export_remote_font(info, ".ttf", "truetype", font);
+    export_remote_font(info, param->font_suffix, param->font_format, font);
 }
 
 void HTMLRenderer::install_base_font(GfxFont * font, GfxFontLoc * font_loc, long long fn_id)
diff --git a/src/Param.h b/src/Param.h
index 3570f5d..ba96cc0 100644
--- a/src/Param.h
+++ b/src/Param.h
@@ -29,6 +29,8 @@ struct Param
     int single_html;
     int always_apply_tounicode;
 
+    std::string font_suffix, font_format;
+
     int debug;
     int clean_tmp;
 };
diff --git a/src/pdf2htmlEX.cc b/src/pdf2htmlEX.cc
index 6a41f5f..46629fd 100644
--- a/src/pdf2htmlEX.cc
+++ b/src/pdf2htmlEX.cc
@@ -74,6 +74,8 @@ po::variables_map parse_options (int argc, char **argv)
         ("veps", po::value<double>(&param.v_eps)->default_value(1.0), "max tolerated vertical offset (in pixels)")
         ("single-html", po::value<int>(&param.single_html)->default_value(1), "combine everything into one single HTML file")
         ("always-apply-tounicode", po::value<int>(&param.always_apply_tounicode)->default_value(0), "ToUnicode map is ignore for non-TTF fonts unless this switch is on")
+        ("font-suffix", po::value<string>(&param.font_suffix)->default_value(".ttf"), "suffix for extracted font files")
+        ("font-format", po::value<string>(&param.font_format)->default_value("truetype"), "format for extracted font files")
         ("process-nontext", po::value<int>(&param.process_nontext)->default_value(1), "process nontext objects")
         ("debug", po::value<int>(&param.debug)->default_value(0), "output debug information")
         ("clean-tmp", po::value<int>(&param.clean_tmp)->default_value(1), "clean temporary files after processing")