In search results, Summary sometimes shows the top of file, not the text I searched for

Question

I'm searching lots of html files, it's a web site that's not imported into Sharepoint. Search is returning the correct files, but about half the time the Summary contains the text at the top of the html file, not the text surrounding the text I searched
for. It's a big problem, users have to open the file then find the search text to see if it's useful.
If I search for 'potato' here's an example Summary which is ok:
All pages in issue FTDA-1983-0409:
 00010002000300040005000600070008000900100011001200130014001500160017001800190020
… today's dieticians, the potato … most of us enjoy a
potato cooked …
Here's a Summary just showing text from the top of the file, 'potato' is present, but lower in the file:
0001000200030004000500060007000800090010001100120013001400150016001700180019002000210022002300240025002600270028
… issue: date: January 19, 1980, page …
Could anyone help me get it to consistently show the text around the search text please?

Answer 1

You can't attach a screenshot to the first post that starts a thread, but you can do that in subsequent replies.
Does this only happen on one specific website?
Can you post a link to a publicly accessible page (i.e. no authentication or signing on required)?
It is possible that there is a problem with that web page and that there is a clear:both CSS rule missing that causes Firefox to start the next line at the horizontal position where the previous line ended.
If you have made changes to Advanced font settings like increasing the minimum/default font size then try the default minimum setting "none" and the default font size 16 in case the current setting is causing problems.
*Firefox > Preferences > Content : Fonts & Colors > Advanced > Minimum Font Size (none)
Make sure that you allow pages to choose their own fonts.
*Firefox > Preferences > Content : Fonts & Colors > Advanced: [X] "Allow pages to choose their own fonts, instead of my selections above"