From Newsgroup: alt.comp.software.firefox

PSA:
Firefox Control+F regex find a or b or c (using match diacritics) a|b|c
So that everyone benefits from every thread, please add useful searches.

Today I needed to search a web page for IPv4 addresses, MAC addresses, or UUIDs & I found that Firefox search can easily handle regular expressions.
([0-9]{1,3}\.){3}[0-9]{1,3}|([A-Fa-f0-9]{2}:){5}[A-Fa-f0-9]{2}|[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}

So, as is my wont, I figured I'd create a quick cheat sheet for others
to benefit from, where they can keep in their handy App Paths launcher.
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\ff.exe
ff.exe=C:\path-to\ff.txt

To bring that up, you just click the runbox in the taskbar and type:
ff

Here are related contents recently added to my Firefox cheat sheets:
1. Control F
2. [x]Match Diacritics
3. a|b|c

Overall, Firefox regex supports:
a. Regex OR patterns -> a|b|c
b. Regex alternation -> the | operator
c. Regex wildcards -> .*
d. Regex word boundaries -> \bword\b
e. Regex optional characters -> colou?r
f. Regex character classes -> [0-9], [A-Za-z]
g. Regex lookaheads -> (?=.*error)(?=.*timeout)
h. Regex grouping

For example, we can combine patterns, e.g.,
(red|blue) car

Find cat or dog, but NOT "catalog" or "dogma" :
\bcat\b|\bdog\b

Find red, blue, or green as standalone words:
\b(red|blue|green)\b

Find variations of a word
colou?r

Find error followed by anything, then failed:
error.*failed

Find user followed by a number:
user[0-9]+

Find any 3-letter word starting with "c":
c[a-z]{2}

Find lines containing both "error" & "timeout" (order doesn't matter):
(?=.*error)(?=.*timeout)
Note: This works because Firefox's regex engine supports lookaheads.

Find HTTP, HTTPS, or HTTP/2:
https?|http/2

Find version 1, version 2, or version 3:
version (1|2|3)

Find "out of memory", "disk full", or "permission denied":
out of memory|disk full|permission denied

Find "login failed" or "authentication error":
login failed|authentication error

Note that Firefox remembers the regex toggle per session.
--
Here on Usenet each of us have decades of experience setting up our devices. --- Synchronet 3.22a-Linux NewsLink 1.2

From Newsgroup: alt.comp.software.firefox

Please ignore. I accidentally sent it w/o full testing.
Ignore this thread. Apologies. It wasn't ready for prime time.
--- Synchronet 3.22a-Linux NewsLink 1.2

From Newsgroup: alt.comp.software.firefox

https://support.mozilla.org/en-US/kb/search-contents-current-page-text-or-links --- Synchronet 3.22a-Linux NewsLink 1.2