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Obscure canvas rendering issue

Hello, I have created a webpage with a canvas element that allows the user to draw an irregular path by pressing down the mouse, similar to the free drawing of a paint … (閱讀更多)

Hello,

I have created a webpage with a canvas element that allows the user to draw an irregular path by pressing down the mouse, similar to the free drawing of a paint application. The issue is that the very first time that the user presses the mouse, the line stops abruptly, while the next times the lines are drawn correctly. The events seem to fire correctly and the page works fine at Chromium, so it seems to be a Firefox issue. You can find the html page below. I am curious, what could be the problem?

<!DOCTYPE html>
<html lang="el">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Canvas</title>
  <style>
    #canvas {
      background-color: whitesmoke;
      border: solid 2px brown;
    }
  </style>
</head>

<body>
  <canvas id="canvas"></canvas>

  <script>
    function startDrawing(e) {
      isDrawing = true;
      context.beginPath();
      context.moveTo(e.offsetX, e.offsetY);
    }

    function draw(e) {
      if (isDrawing) {
        context.lineTo(e.offsetX, e.offsetY);
        context.stroke();
      }
    }

    function stopDrawing(e) {
      console.log("stopped drawing")
      isDrawing = false;
    }

    const canvas = document.getElementById('canvas');
    const context = canvas.getContext('2d');
    var isDrawing = false;
    canvas.width = 1000;
    canvas.height = 1000;
    context.strokeStyle = "#913d88";
    context.lineWidth = 2;
    canvas.onmousedown = startDrawing;
    canvas.onmouseup = stopDrawing;
    canvas.onmousemove = draw;
  </script>
</body>

</html>

ngiatsog 於 22 小時前 詢問

ngiatsog 最近回覆於 3 小時前

firefox ate my history

after downloading and installing v.126 of firefox, my history has disappeared. the browser is not generating new history from web site visits. the history is fixed perman… (閱讀更多)

after downloading and installing v.126 of firefox, my history has disappeared. the browser is not generating new history from web site visits. the history is fixed permanently on a single web address. this is the web address of a site that is in my toolbar. this site cannot be deleted from the history. this site cannot be deleted through the preferences menu. the same site shows in the history file as the only site visited in the past several months, even though i have not visited that site in the past several months. the browser does not show my browsing history. the browser does not create a browsing history. my history function is permanently broken.

help?

drollere 於 20 小時前 詢問

drollere 最近回覆於 6 小時前

Firefox Browser Defaults to the Wrong Time Zone

I've seen a few submissions describing the same or similar issues, but is there a consistent, effective way of changing the time zone in Firefox? It keeps defaulting to t… (閱讀更多)

I've seen a few submissions describing the same or similar issues, but is there a consistent, effective way of changing the time zone in Firefox? It keeps defaulting to the wrong time zone (despite everything else on my system displaying the correct time zone) and has been doing so for weeks. Solutions appreciated!

linsilver888 於 6 小時前 詢問

binance problem with live price

Hi support from yesterday firefox has a problem Different computers Different internet same problem Different versions of Brouzer I have the same problem with both of you… (閱讀更多)

Hi support from yesterday firefox has a problem Different computers Different internet same problem Different versions of Brouzer I have the same problem with both of you yesterday is a problem Binance prices does not cope in Live not only the prices but other items do not work. Tested on another brouzer neatly doing some problem to you

Thank's

nebojsa3 於 7 小時前 詢問

After update, when I click on auto fill option a settings tab opens every single time

After update, when I click on auto fill option a settings tab opens every single time. I close it and it happens again. I use firefox to fill out some repeated forms (and… (閱讀更多)

After update, when I click on auto fill option a settings tab opens every single time. I close it and it happens again. I use firefox to fill out some repeated forms (and separate topic would also like to customize these autofils and pre-write some ideally), but this is a new problem that breaks using firefox totally for me, causing lots of scrolling clicks and time wastage. What changed that can be fixed in recent updates on this? Thanks.

bryant4 於 14 小時前 詢問

A new pop-up box is preventing me from using a site I have been using regularly for several years

I've been using a Rewards site regularly (3/4 times per month) for several years without problem. This weekend the attached pop-up appeared. It makes no difference wheth… (閱讀更多)

I've been using a Rewards site regularly (3/4 times per month) for several years without problem. This weekend the attached pop-up appeared. It makes no difference whether I select Resend or Cancel, the program just re-displays the pop-up trapping me in an endless loop. The only exit is to close the window and abort the process. I was able to complete the task without any problem using Edge instead so it appears to be a Firefox specific issue. I haven't consciously changed anything since last using the site successfully on 24 May. Any help/suggestions appreciated.

eregister 於 1 天前 詢問

eregister 最近回覆於 17 小時前

Find in Page Not Working

The Find in Page feature is not working in my build of Firefox Nightly. Application Basics Name: Firefox Version: 128.0a1 Build ID: 20240602210803 Distribution ID: U… (閱讀更多)

The Find in Page feature is not working in my build of Firefox Nightly. Application Basics


Name: Firefox Version: 128.0a1 Build ID: 20240602210803 Distribution ID: Update Channel: nightly User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Firefox/128.0 OS: Windows_NT 10.0 22631 Launcher Process: Enabled Multiprocess Windows: 3/3 Fission Windows: 3/3 Enabled by default Remote Processes: 10 Enterprise Policies: Inactive Google Location Service Key: Found Google Safebrowsing Key: Found Mozilla Location Service Key: Found Safe Mode: true Memory Size (RAM): 31.8 GB Disk Space Available: 685 GB Pointing Devices: Mouse

lauren.y.maples 於 18 小時前 詢問

Buzzing static noise when visiting certain sites

In Firefox, whenever I go to nab.com.au and then click on Login on the top right, I hear a constant stream of static noise coming out of the speakers. In Chrome, when I… (閱讀更多)

In Firefox, whenever I go to nab.com.au and then click on Login on the top right, I hear a constant stream of static noise coming out of the speakers.

In Chrome, when I just visit nab.com.au that same noise starts.

I have a set of Bose speakers connected via an optical cable.

This behaviour doesn't happen on all sites. Just some. As soon as you close the tab, the noise goes away.

It's driving me absolutely nuts.

flecko561 於 1 天前 詢問

Mozilla Firefoz crashes multiple times after waking laptop from sleep

The behavior began with fifteen to twenty crash messages appearing. After which the browser would stop responding and be unable to reach out to the internet. Network con… (閱讀更多)

The behavior began with fifteen to twenty crash messages appearing. After which the browser would stop responding and be unable to reach out to the internet.

Network connectivity was confirmed as I was able to access my VPN and corporate teams.

I submitted as many crash reports as I could. Eventually the crash reporter ceased to function. The message is:

Firefox had a problem and crashed. Unfortunately, the crash reporter is unable to submit a report for this crash.

Details: expected value at line 1 column 1

Only a full reboot of the machine restored functionality but only temporarily. It returns after being put into sleep mode.

Running firefox in safe mode does not restore functionality. The behavior persists.

I am fully up to date according to firefox.

I am running a Lenovo Thinkpad Windows 11.

Candlejack 於 1 天前 詢問

google setting page incomplete

when I sign into Goog/setting/2 step, the page does not show "app passwords." I've turned off my ad-blocker extensions and pop-up blocker on the page. See attached. … (閱讀更多)

when I sign into Goog/setting/2 step, the page does not show "app passwords." I've turned off my ad-blocker extensions and pop-up blocker on the page. See attached.

metropical 於 1 天前 詢問

metropical 最近回覆於 1 天前

Firefox Private Browsing

I have recently been getting an error message when I open Firefox saying "The bookmarks and history system will not be functional because one of Firefox's files is in use… (閱讀更多)

I have recently been getting an error message when I open Firefox saying "The bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security software can cause this problem". This has been happening since I clicked on a mail in Mail to unsubscribe from a spam/phishing mail list, which seemed to result in me installing Firefox Private Browsing, which I had never subscribed to. I have tried uninstalling Private Browsing but there is no way of doing that. I have even uninstalled and then re-installed Firefox completely but I still have the same problem. Because of the problem I have now lost all my bookmarks and history, and am unable to create new bookmarks and history. I have been on the help forums and seen that I can Disable Private Browsing by going through my anti-virus (Avast), which I have not yet tried because what I would really like to achieve is uninstalling and not having Private Browsing on my Start menu, rather than simply disabling it. Anyway, would disabling it solve the bookmarks and history problem ? Can anyone give me the solution ? Thanks. As you may gather, I am not very techno so you would have to give me the idiot's version of any instructions or advice.

jeremyboyce.com 於 1 週前 詢問

Hard Drive failure on Windows 10 pc

hard drive failed on windows 10 pc, new drive put in & window 10 reinstalled with Edge browser (by experts) What do i do to get firefox browser as my main browser bac… (閱讀更多)

hard drive failed on windows 10 pc, new drive put in & window 10 reinstalled with Edge browser (by experts) What do i do to get firefox browser as my main browser back with all my bookmarks etc & firefox VPN ?

Do I just download firefox installer & sign on & all bookmarks etc will be there?

Thank you for your help, Tony

AAA 於 2 天前 詢問

Lock out of my Laptop is out of funktion. Why?

Mein Laptop reagiert nicht, wenn ich mich über lockout abmelden will. Mir wird stets die Seite "Fehler: Gesicherte Verbindung Fehlgeschlagen." und nicht wie vormals beim … (閱讀更多)

Mein Laptop reagiert nicht, wenn ich mich über lockout abmelden will. Mir wird stets die Seite "Fehler: Gesicherte Verbindung Fehlgeschlagen." und nicht wie vormals beim öffnen des Laptops. Wo liegt der Fehler?

edgargrewe 於 2 天前 詢問

Youtube vids are skipping about 5-10 seconds intermittently.

For the last few weeks i've noticed youtube vids buffer but then sometimes stop and when the video reaches that point on the bar it skips about 5-10 seconds, then contine… (閱讀更多)

For the last few weeks i've noticed youtube vids buffer but then sometimes stop and when the video reaches that point on the bar it skips about 5-10 seconds, then contines to buffer like normal, so I have to use the arrow keys to go back to see what I missed. It is very annoying. Happens almost 1-2 every day at random times. My wifi speed is good. I've cleared cookies and caches, turned off enhanced tracking protection for youtube, i've even increased perfomance settings for intel graphics in my pc's power manegment plan. Nothing! Can anyone help, thanks.

up656196 於 2 天前 詢問