Regular Expressions 101

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/
(<div.*?class="moz-widget-id"[^>]*>)(.*?)(<\/div>)
/
1st Capturing Group
(<div.*?class="moz-widget-id"[^>]*>)
<div
matches the characters <div literally (case sensitive)
.
matches any character (except for line terminators)
*? matches the previous token between zero and unlimited times, as few times as possible, expanding as needed (lazy)
class="moz-widget-id"
matches the characters class="moz-widget-id" literally (case sensitive)
Match a single character not present in the list below
[^>]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
> matches the character > with index 6210 (3E16 or 768) literally (case sensitive)
> matches the character > with index 6210 (3E16 or 768) literally (case sensitive)
2nd Capturing Group
(.*?)
.
matches any character (except for line terminators)
*? matches the previous token between zero and unlimited times, as few times as possible, expanding as needed (lazy)
3rd Capturing Group
(<\/div>)
< matches the character < with index 6010 (3C16 or 748) literally (case sensitive)
\/ matches the character / with index 4710 (2F16 or 578) literally (case sensitive)
div>
matches the characters div> literally (case sensitive)
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/

Test String