Fantastic add-on (thanks Nodetics)

Overall this is an amazing add-on, a must have if you like to monitor product prices but want more control/options than what you get in similar add-ons. You will probably need to learn some regex to extract the value you want (using the Converter option) in my case most of the strings the add-on extracts from the products pages are like:
'something here R$ 1,000.00' or just 'R$ 800.00'
I only need the numbers and the dot so I added a Regexp in the Converter with this (regex) in the replace field:
[^\d.]+
That regex means: select anything that is not (^) a number (\d) or a dot (.) between one and unlimited times (+),
You leave the 'With' field blank (with nothing), that way it will remove the matched characters.
So using my examples it would convert these strings to: 1000.00 and 800.00

Suggestions:
1- Make the 'URL' and 'Content Selector' (Selector) accept multiple strings, some webpages have promotions (ex: Black Friday) where the product is the same but they actually change the whole page (url/css). if this change isn't viable or is too complex, maybe allow regex in these inputs.

2- Allow the user to remove singular entries from the 'tracker data history' GRAPH
I had some regex/xpath issues and I end up with some wrong values in the graph, so if I could easily remove it without having to remove all the graph data it would be great.

3- More graph options, the curved lines are kinda weird.

Bug/Issue (already in the FAQ):
The add-on doesn't work with the Firefox Multi-Account Containers, even if you set the add-on and the pages to use the same container it opens the page and then give you the 600 error as if the Css Selector didn't find anything. You have to remove the sites from the containers (Add-on icon > Manage Containers) to make it work again.

Great extension!
You can fine-tune the settings.
The only downside is the absence of the Russian language, I hope in the future the developer will add it.

Отличное расширение!
Можно очень тонко настроить параметры.
Минус только в отсутствии русского языка, надеюсь в будущем разработчик его добавит.

I've used other page monitors but this seems to be in a league of its own!!

The ONLY thing I'd change is its lack of live content-selector feedback. You know, as you get with most adblockers? Something that immediatly shows what the content selector string is pointing too.

Edit: I'm struggling to track changes in text formatting (from normal to bold of underlined for example). Check4changes will monitor HTML code. How do you do this in PageProbe?

Great addon. Works perfectly except for a blip. I seem to be losing log data. Does this addon delete log entries after a specific time period or number of entries?
EDIT: That makes sense for a small number of trackers but I'm dealing with about 5-600 rapidly changing trackers. Any way you could suggest to handle that?
EDIT2: That would be great.
EDIT3: Bug report. You can't open the settings for a monitor beyond the first page. Steps to reproduce. 1: Create enough filters to fill more than a page. 2: Scroll a page below and click settings. 3: Nothing happens.
EDIT4: A batch refresh failed trackers option would be appreciated.
EDIT5: Thank you. Figured it out.
EDIT6: Is the black bar beside the scrollbar in this picture (https://i.imgur.com/1JIIit4.png) intentional? Because it's wasting space.

This extension is awesome. I have been using for a couple of weeks now to track text changes on websites and it works like a charm. Also it checks the pages very fast and it gives the user the option to chose between static or dinamic page load, which is awesome for people who needs to monitor lots os pages.

This add-on is shaping up to be a nice competitor to Distill Web Monitor. Highly recommended.

excellent addon. please confirm my donation.

suggestion:
- i need separate log data for each sites.
- could you add unread icon like Distill?

A great replacement for those looking for a better page monitor. Adds conditions and actions which only Distill (which is paid) supported uptil now.