browser freezes when big rancid configs are tried to be displayed

Browser freezes if rancid configs with i.e. 200k lines are tried to be displayed.
I tried this with firefox and also safari. Both freeze and need to be killed.

I tried to workaround with the following change in html/pages/device/showconfig.inc.php

diff showconfig.inc.php.orig showconfig.inc.php
227c227,235
< <?php echo(escape_html($device_config)); ?>
—
> <?php
> $device_config_lines = count(file($device_config_file));
> if ($device_config_lines < 10000)

Unknown macro: { > echo(escape_html($device_config)); > }

else

Unknown macro: { > echo("Sorry, too many lines to display}

> ?>

With this workaround the config is not displayed if it has more than 10k lines. I think it would be nicer to be able to download the config file but at least the browser does not freeze any more.
I also do not know how many lines can be displayed in a browser without any problems.