v3.10.8 javascript error

Hi,
with newer versions and some older browsers (eg. Firefox 43) I've one Javascript error:

SyntaxError: missing ; before statement

With previous version no errors appears with Firefox 43 too.

I keep undoing modernization efforts to support obsolete browsers.... This is the result of an IE11 modification, now I must downgrade again to support FF43 (which reached end-of-life January 2016)

The problem is that FF (apparently) doesn't support the "let" variable assignment. So, I've removed it and it will be part of the 3.10.10 release - probably sometime this week.

I know this is a big problem cause many users still using older browsers.
So for fix this error I can modify js code to remove let declaration?

I already released the update. It's done - just upgrade to the latest version, which is 3.10.11

Since GDPR went live, I get bug reports all the time. I don't let them sit around. They get fixed immediately. I had a couple of new reports last night, and a few new versions were released to resolve them.

Just upgraded. Clean joomla cache and browser cache but in FF43 cookie banner doesn't appears cause there are two new js error:

SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data
SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data

FF 43 can't handle element.innerText....pity

Maybe that's why they end-of-life'd it in 2016