Hi, I regularly use firefox 51.0 as my default browser because telling it not to update actually works and I hate forced updates.
However some content cannot be viewed in that browser due to googles rabid update march essentially rewriting javascript and html so old browsers cant read it.
So, webp is one of those formats that wont load in old firefox, its an image format. So I would like to develop an addon that tells firefox 51 how to load a .webp image.
I know javascript and html, and canprobably lookup the format for a webp file, so how do I get started writing such an addon?
Also if someone else wants to spearhead this project thats fine but please do share sourcecode.
Ps this website is too new for any browsers I have available on my windows 7 computer. Thats the last operating system I trust. So its a pain to get on here via phone.
Sorry, I know it is not the answer you are looking for, but running Windows 7 & Firefox 51.0 means putting yourself in high risk of getting hacked.
Preferable also update your Windows version, but at least use Firefox 115.x ESR which is not only the latest/last version of Firefox to support Windows 7/8, it is also extraordinarily still getting security updates - because of people stuck with Windows 7/8.
While Firefox 115 is not the very latest, most sites should still work with it. And it supports webp.
However, security-updates for Firefox 115.x ESR won’t last for ever. Currently looks like it will end in March:
I don’t want an excuse, I’d like a howto article on getting started on writing addons for old firefox. Not much to ask, from there I could adapt googles own webp source into the addon and install it as a temp addon then make it permanent in about config.
Thats the plan.
Firefox 51 is unsupported. Your best bet is to consult an old version of the relevant MDN documentation on the Wayback Machine. Good luck!