you can also get rid off this "display:none" part to show a forum post like you were editing it which will show you the text
For my posts, I can just click "edit post" and it will have the same effect. This only works on your own posts, not posts by others.
temporarily you can put the following code in your custom css extension
span[style="display:none"] { display: block; }
this will show every post like you were editing it. its not good but at least you can read the forums
note that it might screw up some things of the website visually since it makes everything marked as invisible to visible
I recommend writing the temporary rule: form[name='newpost'] > span { display: block; }
This will target only the forum posts, and ignore anything else on the site.
wth is this sussy situation, is it only me or doesnt the same fix apply to guides?